{"title":"F87 Chassis","description":null,"products":[{"product_id":"er-n55-downpipe","title":"Evolution Racewerks 4\" Downpipe — N55 (F-Chassis)","description":"\u003cp\u003e\u003cstrong\u003eEvolution Racewerks 4\" downpipe for the single-turbo N55.\u003c\/strong\u003e The N55 is the bridge engine between the older twin-turbo I6 and the modern B58. Smaller exhaust mass-flow than either, but the OEM downpipe restriction still caps Stage 2 + 3 N55 builds at peak power. ER's 4\" replacement opens that restriction completely.\u003c\/p\u003e\n\n\u003ch3\u003eN55 single-turbo math\u003c\/h3\u003e\n\u003cp\u003eThe N55 uses a single twin-scroll turbo. One downpipe to replace (not the twin setup of the S55). ER's 4\" pipe handles the N55's airflow ceiling cleanly through Stage 3 on a supporting-hardware build.\u003c\/p\u003e\n\n\u003ch3\u003eReal-world output difference\u003c\/h3\u003e\n\u003cp\u003eCommunity feedback on calibrated N55 builds consistently reports a measurable gain from the downpipe alone — the pipe removes a restriction the OEM section imposes for noise and emissions compliance, which the tune can then capitalize on.\u003c\/p\u003e\n\n\u003ch3\u003eCatless vs Catted\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCatless:\u003c\/strong\u003e race-only, maximum flow. CEL on stock cal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Flow Catted:\u003c\/strong\u003e 200-cell metallic catalyst. CEL-clean on stock cal.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Evolution Racewerks builds in\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e100% 304-grade stainless steel construction\u003c\/li\u003e\n \u003cli\u003eMandrel-bent piping — smooth transitions, no flow restrictions at the bends\u003c\/li\u003e\n \u003cli\u003e100% TIG-welded by ER's in-house fabricators\u003c\/li\u003e\n \u003cli\u003ePrecision CNC-machined flanges (billet 304 stainless)\u003c\/li\u003e\n \u003cli\u003eMade in the USA — manufactured in-house at ER's California facility\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eLimited Lifetime Warranty\u003c\/strong\u003e against manufacturing defects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEGT bung included — standard on every Esse Werks ER order\u003c\/h3\u003e\n\u003cp\u003eEvolution Racewerks offers the EGT (Exhaust Gas Temperature) sensor bung as an optional add-on on their direct catalog. \u003cstrong\u003eWe include it on every ER downpipe \/ mid pipe we ship — no upcharge.\u003c\/strong\u003e Comes pre-installed with a 1\/8\" NPT plug so you don't need to run the EGT sensor immediately. When you're ready to add EGT monitoring to your build (recommended at Stage 2 and above for any sustained-load driving), the bung is already there.\u003c\/p\u003e\n\n\u003ch3\u003eSwainTech White Lightning — our signature coating\u003c\/h3\u003e\n\u003cp\u003eWhen we coat a part, we use one coating: SwainTech White Lightning — a true ceramic thermal barrier applied about 0.015\" thick (versus roughly 0.002\" for paint-style \"ceramic\" finishes) and sprayed molten so it bonds to the metal instead of sitting on top. It cuts radiant heat off the exhaust by roughly 35–55%, dropping underhood and intake temperatures, and keeps heat inside the pipe where it sustains exhaust velocity and scavenging. And it's white — a deliberate signature in a market that otherwise all looks the same in black. Select it above.\u003c\/p\u003e\n\n\u003ch3\u003eCalifornia restriction\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis product is not for sale, installation, or use on licensed vehicles in the State of California.\u003c\/strong\u003e 49-state product. Vehicle Compliance Waiver signed at order intake. International orders ship without restriction.\u003c\/p\u003e\n\n\u003ch3\u003eInstall\u003c\/h3\u003e\n\u003cp\u003e~3-4 hours at a competent shop. Reuses OEM hardware where applicable. Includes all hardware for complete installation.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eAll N55 BMW applications — F20\/F21 M135i, F22\/F23 M235i (2014-2016 N55), F30 335i (2012-2015), F31 335i Touring, F32 435i (2014-2016), F33 435i, F36 435i, F87 M2 (2016-2018 pre-Competition).\u003c\/p\u003e\n\u003cp\u003eThis part is the downpipe-side Core of every N55 Stage 2 build. The \u003ca href=\"\/products\/stage-2-kit-n55\"\u003eStage 2 Kit — N55\u003c\/a\u003e packages the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Evolution Racewerks","offers":[{"title":"Catless — Brush Finish","offer_id":43280679534653,"sku":"EW-EXH-ER-N55-CATLESS","price":615.0,"currency_code":"USD","in_stock":true},{"title":"Catless — SwainTech White Lightning","offer_id":43280679567421,"sku":"EW-EXH-ER-N55-CATLESS-CER","price":865.0,"currency_code":"USD","in_stock":true},{"title":"High-Flow Catted — Brush Finish","offer_id":43280679600189,"sku":"EW-EXH-ER-N55-CAT","price":965.0,"currency_code":"USD","in_stock":true},{"title":"High-Flow Catted — SwainTech White Lightning","offer_id":43280679632957,"sku":"EW-EXH-ER-N55-CAT-CER","price":1215.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/er-n55-downpipe-01.webp?v=1781743119"},{"product_id":"spool-fx200-hpfp-n55","title":"Spool Performance FX-200 High-Pressure Fuel Pump — N55 (F-Chassis)","description":"\u003cp\u003e\u003cstrong\u003eSpool Performance FX-200 high-pressure fuel pump for the F-chassis N55 — the direct-injection pump that clears the Stage 2\/3 fueling ceiling.\u003c\/strong\u003e The factory DI pump runs out of volume as boost and ethanol climb, and the calibration starts trimming power to hold rail pressure. The FX-200 roughly doubles stock flow, so fuel stops being the limit.\u003c\/p\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA direct, plug-and-play replacement for the OEM high-pressure (direct-injection) pump — larger bore, about twice stock flow, E85-compatible. A matching calibration is loaded before first start.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eThe high-pressure (DI) side; on a Stage 3 build it pairs with an upgraded low-pressure in-tank pump so it stays fed. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eOptions\u003c\/h3\u003e\n\u003cp\u003eSpool offers a wireless ethanol-content analyzer and a 10-micron inline filter as add-ons — tell us if you want either specced in.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW N55 (F-chassis) — F20\/F21 M135i, F22\/F23 M235i, F30 335i, F32\/F33\/F36 435i, F87 M2, F25 X3 35i, F26 X4 35i, F10 535i. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eSourcing fueling with the tune? The \u003ca href=\"\/products\/fueling-kit-n55\"\u003eFueling Kit — N55\u003c\/a\u003e bundles the matched pump + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"None \/ None","offer_id":43280681336893,"sku":"SP-FX-200-N55-NENF-DFVA","price":2205.0,"currency_code":"USD","in_stock":true},{"title":"Use my existing \/ None","offer_id":43280681369661,"sku":"SP-FX-200-N55-NENF-DFVA-UE","price":2205.0,"currency_code":"USD","in_stock":true},{"title":"Include \/ None","offer_id":43280681402429,"sku":"SP-FX-200-N55-NENF-DFVA-EA","price":2554.0,"currency_code":"USD","in_stock":true},{"title":"None \/ With 10-Micron Filter","offer_id":43280681435197,"sku":"SP-FX-200-N55-NENF-DFVA-F","price":2354.0,"currency_code":"USD","in_stock":true},{"title":"Use my existing \/ With 10-Micron Filter","offer_id":43280681467965,"sku":"SP-FX-200-N55-NENF-DFVA-UE-F","price":2354.0,"currency_code":"USD","in_stock":true},{"title":"Include \/ With 10-Micron Filter","offer_id":43280681500733,"sku":"SP-FX-200-N55-NENF-DFVA-EA-F","price":2703.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/spool-fx200-hpfp-ew02.webp?v=1781742887"},{"product_id":"er-comp-catless-dp-s55","title":"ER Competition Series Catless Downpipes — S55","description":"\u003cp\u003e\u003cstrong\u003eEvolution Racewerks Competition Series twin downpipes for the S55 — F80 M3, F82 M4, F83 M4 Convertible, F87 M2 Competition.\u003c\/strong\u003e Twin 3.5\" mandrel-bent T304 stainless pipes — one per turbo. The largest downpipe section in ER's catalog for a reason: the S55 makes meaningful exhaust flow that the OEM downpipes deliberately restrict for noise compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe S55 and downpipes\u003c\/h3\u003e\n\u003cp\u003eThe OEM S55 downpipes are restrictive enough that even un-tuned M3\/M4 owners commonly report a meaningful difference from a downpipe alone. On Stage 2 and Stage 3 builds, OEM downpipes become the single biggest exhaust restriction — replacing them is standard for any serious F8X tune.\u003c\/p\u003e\n\n\u003ch3\u003eFor the F87 M2 Competition specifically\u003c\/h3\u003e\n\u003cp\u003eSame engine as the M3\/M4 but in a smaller chassis with slightly different exhaust routing. These downpipes drop post-turbo back-pressure to the level the S55's wastegate strategy expects, sharpening throttle response across the rev range.\u003c\/p\u003e\n\n\u003ch3\u003eCatless vs Catted\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCatless:\u003c\/strong\u003e race-only, twin 3.5\" pipes, no cat material. CEL on stock cal — Esse Werks Stage 2\/3 calibrations clear it. Standard choice for track-driven F8X builds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Flow Catted:\u003c\/strong\u003e 200-cell metallic cats in both pipes. CEL-clean on stock cal. Community-observed flow sits close to the catless pipes for street and most track use.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Evolution Racewerks builds in\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e100% 304-grade stainless steel construction\u003c\/li\u003e\n  \u003cli\u003eMandrel-bent piping — smooth transitions, no flow restrictions at the bends\u003c\/li\u003e\n  \u003cli\u003e100% TIG-welded by ER's in-house fabricators\u003c\/li\u003e\n  \u003cli\u003ePrecision CNC-machined flanges (billet 304 stainless)\u003c\/li\u003e\n  \u003cli\u003eMade in the USA — manufactured in-house at ER's California facility\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLimited Lifetime Warranty\u003c\/strong\u003e against manufacturing defects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEGT bung included — standard on every Esse Werks ER order\u003c\/h3\u003e\n\u003cp\u003eEvolution Racewerks offers the EGT (Exhaust Gas Temperature) sensor bung as an optional add-on on their direct catalog. \u003cstrong\u003eWe include it on every ER downpipe \/ mid pipe we ship — no upcharge.\u003c\/strong\u003e Comes pre-installed with a 1\/8\" NPT plug so you don't need to run the EGT sensor immediately. When you're ready to add EGT monitoring to your build (recommended at Stage 2 and above for any sustained-load driving), the bung is already there.\u003c\/p\u003e\n\n\u003ch3\u003eSwainTech White Lightning — our signature coating\u003c\/h3\u003e\n\u003cp\u003eWhen we coat a part, we use one coating: SwainTech White Lightning — a true ceramic thermal barrier applied about 0.015\" thick (versus roughly 0.002\" for paint-style \"ceramic\" finishes) and sprayed molten so it bonds to the metal instead of sitting on top. It cuts radiant heat off the exhaust by roughly 35–55%, dropping underhood and intake temperatures, and keeps heat inside the pipe where it sustains exhaust velocity and scavenging. And it's white — a deliberate signature in a market that otherwise all looks the same in black. Select it above.\u003c\/p\u003e\n\n\u003ch3\u003eCalifornia restriction\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis product is not for sale, installation, or use on licensed vehicles in the State of California.\u003c\/strong\u003e 49-state product. Vehicle Compliance Waiver signed at order intake. International orders ship without restriction.\u003c\/p\u003e\n\n\u003ch3\u003eInstall\u003c\/h3\u003e\n\u003cp\u003e~3-4 hours at a competent shop. Reuses OEM hardware where applicable. Includes all hardware for complete installation.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eS55 twin-turbo applications — F80 M3, F82 M4, F83 M4 Convertible, F87 M2 Competition (2018-2021).\u003c\/p\u003e\n\u003cp\u003eThis part is the downpipe-side Core of every S55 Stage 2 build. The \u003ca href=\"\/products\/stage-2-kit-s55\"\u003eStage 2 Kit — S55\u003c\/a\u003e packages the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Evolution Racewerks","offers":[{"title":"Catless — Brush Finish","offer_id":43280681861181,"sku":"EW-EXH-ER-S55-CATLESS","price":1415.0,"currency_code":"USD","in_stock":true},{"title":"Catless — SwainTech White Lightning","offer_id":43280681893949,"sku":"EW-EXH-ER-S55-CATLESS-CER","price":1665.0,"currency_code":"USD","in_stock":true},{"title":"High-Flow Catted — Brush Finish","offer_id":43280681926717,"sku":"EW-EXH-ER-S55-CAT","price":1765.0,"currency_code":"USD","in_stock":true},{"title":"High-Flow Catted — SwainTech White Lightning","offer_id":43280681959485,"sku":"EW-EXH-ER-S55-CAT-CER","price":2015.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/ER__competition-series-catless-downpipes-2015-20-m2-competition-m3-m4-s55-engine_01.webp?v=1781743119"},{"product_id":"snow-performance-stage-3-methanol-kit","title":"Snow Performance Stage 3 DI Water\/Methanol Kit","description":"\u003cp\u003e\u003cstrong\u003eCharge cooling that lowers IAT under sustained boost.\u003c\/strong\u003e The Stage 3 DI kit injects a 49% methanol \/ 51% water mix (Snow's Boost Juice) into the charge tract. Effective IAT drop is 15–35°F depending on ambient and boost pressure. Detonation margin moves with it.\u003c\/p\u003e\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHD pump with steel-braided pressure line\u003c\/li\u003e\n\u003cli\u003eController with boost-referenced injection mapping (electronically dosed, not vacuum-line driven)\u003c\/li\u003e\n\u003cli\u003eReservoir, mounting hardware, harness\u003c\/li\u003e\n\u003cli\u003e1 gallon of Boost Juice to start the system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat it does for your tune\u003c\/h3\u003e\u003cp\u003eCharge cooling buys timing margin. On a calibrated B48 or B58 running aggressive timing in the cells where the engine is most knock-limited, meth allows 1–3° more advance at the same knock probability. That's not a flat power number — it's a track-day repeatability number.\u003c\/p\u003e\u003ch3\u003eNot magic\u003c\/h3\u003e\u003cp\u003eMeth is not a substitute for proper fueling, a correctly sized intercooler, or a calibration that respects your fuel system's actual capacity. It is an additional knock margin tool. We use it on Stage 2+ builds where the customer drives the car hot.\u003c\/p\u003e","brand":"Snow Performance","offers":[{"title":"Default Title","offer_id":43280686678077,"sku":"EW-ENG-METHKIT-S3","price":1205.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/snow_stg3_DI_EW_BLK01.png?v=1781742738"},{"product_id":"dorch-n55-hpfp-upgrade","title":"Dorch Engineering N55 HPFP Upgrade","description":"\u003cp\u003e\u003cstrong\u003eDorch Engineering high-pressure fuel pump upgrades for the N55.\u003c\/strong\u003e The N55 OEM HPFP is the fuel-system bottleneck on tuned single-turbo I6 builds — Stage 2+ calibration pulls more fuel mass-flow than the factory pump can sustain, which surfaces as fuel pressure deviation codes, knock under load, and progressive engine wear if left unaddressed.\u003c\/p\u003e\n\n\u003ch3\u003eTwo options\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLift Kit\u003c\/strong\u003e — Dorch's proprietary cam installed inside the OEM HPFP cartridge. More fuel flow on the factory pump body. Same OEM packaging, same OEM hard line connections, no fitment changes. Requires a core deposit — return your OEM pump cartridge to Dorch within 30 days, get the core refund.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDS25 Stage 2\u003c\/strong\u003e — Full pump assembly with Dorch's larger-displacement cartridge. Bolt-in replacement for the OEM HPFP. No core required. The build path for Stage 3 N55 builds running E85 or methanol injection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat you need to know\u003c\/h3\u003e\n\u003cp\u003eThe N55 platform fuel system upgrade conversation usually starts with the Lift Kit because of the price and packaging simplicity. If you're targeting top-end Stage 3 N55 output or running aggressive E-blend fueling, the DS25 is the right call from the start — the Lift Kit eventually becomes the limiting factor at sustained high-flow operation.\u003c\/p\u003e\n\n\u003ch3\u003ePair with the calibration\u003c\/h3\u003e\n\u003cp\u003eThe Esse Werks N55 Stage 2 \/ Stage 3 calibrations are built around the higher fuel flow capacity these pumps deliver. Without the HPFP upgrade, our calibrations will pull fuel-pressure trim aggressively at boost to stay within OEM pump capacity — meaning you don't realize the full output the calibration is designed for. The pump upgrade is what gets you there.\u003c\/p\u003e\n\n\u003ch3\u003eInstall\u003c\/h3\u003e\n\u003cp\u003e~2 hours at a competent shop. The HPFP sits on top of the N55 valve cover, accessible without removing the intake manifold. Lift Kit install requires disassembly of the OEM pump cartridge; DS25 install is a bolt-in replacement.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003e2012-2018 BMW N55 applications. F-chassis 1\/2\/3\/4 Series with N55 engine. F87 M2 (2016-2018 pre-Competition only — the M2 Competition uses the S55 engine, different HPFP). Confirm engine code at intake.\u003c\/p\u003e\n\u003cp\u003eIf you're sourcing fueling alongside the calibration, the \u003ca href=\"\/products\/fueling-kit-n55\"\u003eFueling Kit — N55\u003c\/a\u003e bundles the matched pump + tune for 8% under à la carte.\u003c\/p\u003e","brand":"Dorch Engineering","offers":[{"title":"Lift Kit (Stage 1 — ~+38% Flow, OEM Housing)","offer_id":43280686874685,"sku":"EW-FUEL-DORCH-N55-LIFT","price":1275.0,"currency_code":"USD","in_stock":true},{"title":"DS25 Stage 2 (Full Pump Upgrade, ~+25% Displacement)","offer_id":43280686907453,"sku":"EW-FUEL-DORCH-N55-DS25","price":2595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/dorch_N55_DS3.webp?v=1781742887"},{"product_id":"dorch-s55-hpfp-lift-kit","title":"Dorch Engineering S55 HPFP Lift Kit","description":"\u003cp\u003e\u003cstrong\u003eDorch Engineering Lift Kit for the S55 HPFP.\u003c\/strong\u003e The S55 has TWO high-pressure fuel pumps (one per turbo bank). This kit pushes more fuel flow out of the OEM HPFP architecture by installing a proprietary Dorch-designed cartridge inside each pump body. Preserves OEM packaging, OEM fuel lines, and OEM electrical — the upgrade lives entirely inside the cartridges.\u003c\/p\u003e\n\n\u003ch3\u003eWhy the S55 needs this\u003c\/h3\u003e\n\u003cp\u003eStage 2 S55 and especially Stage 3 (on E85) calibrations exceed what the OEM HPFP pair can sustain at sustained boost. The symptom is fuel pressure deviation under load, which the calibration handles by pulling timing — meaning you don't get the output the tune is designed for. The Lift Kit is the cleanest way there without going to a full pump replacement.\u003c\/p\u003e\n\n\u003ch3\u003eCore deposit required\u003c\/h3\u003e\n\u003cp\u003eThis is a core-exchange product. Your existing OEM HPFP cartridges ship to Dorch within 30 days of receiving the upgrade; you receive the core deposit refund once Dorch confirms intact returns. If you don't return the cores within 30 days, the core deposit is forfeited. We handle the core return paperwork on your behalf at order intake.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo Dorch-designed HPFP cartridges (one per turbo bank)\u003c\/li\u003e\n  \u003cli\u003eInstallation hardware\u003c\/li\u003e\n  \u003cli\u003eDetailed install documentation (Dorch's PDF — we'll email it at order)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstall\u003c\/h3\u003e\n\u003cp\u003e~3-4 hours at a competent shop. F8X M-car HPFP access requires partial intake manifold removal — more involved than the inline-six platforms. Re-prime fuel system after install before flashing the matched Stage 2+ calibration.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003e2014-2020 BMW F80 M3, F82 M4, F83 M4 Convertible. 2018-2021 F87 M2 Competition (S55 engine, post-2018). For the pre-Competition F87 M2 (2016-2018, N55 engine), see the Dorch N55 HPFP Upgrade.\u003c\/p\u003e\n\u003cp\u003eIf you're sourcing fueling alongside the calibration, the \u003ca href=\"\/products\/fueling-kit-s55\"\u003eFueling Kit — S55\u003c\/a\u003e bundles the matched pump + tune for 8% under à la carte.\u003c\/p\u003e","brand":"Dorch Engineering","offers":[{"title":"Default Title","offer_id":43280695394365,"sku":"EW-FUEL-DORCH-S55-LIFT","price":1615.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/dorch_S55LK.webp?v=1781742887"},{"product_id":"spool-stage3-lpfp-s55","title":"Spool Performance Stage 3 Low-Pressure Fuel Pump — S55","description":"\u003cp\u003e\u003cstrong\u003eSpool Performance Stage 3 low-pressure fuel pump for the S55 — F80 M3, F82\/F83 M4, F87 M2 Competition.\u003c\/strong\u003e A big high-pressure pump is only as good as what feeds it; the factory in-tank (low-pressure) pump runs out of duty on E85 and high boost, and rail pressure drops up top. Spool's Stage 3 adds a boost-activated secondary in-tank pump, roughly doubling low-pressure flow.\u003c\/p\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA twin-pump in-tank upgrade: the factory pump plus a second pump that switches on under boost (boost\/Hobbs-switch activated), so cruise stays factory-quiet and the system only ramps when you're on it. Spool rates it to support 1,200+ whp, and it's a complete drop-in replacement — no assembly or core return.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eLow-pressure (in-tank) side; it pairs with an upgraded high-pressure (DI) pump so the HPFP is never starved. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eS55 — F80 M3, F82 M4, F83 M4 Convertible, F87 M2 Competition. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eSourcing fueling with the tune? The \u003ca href=\"\/products\/fueling-kit-s55\"\u003eFueling Kit — S55\u003c\/a\u003e bundles the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"Assembled","offer_id":43280699260989,"sku":"SP-BMF8x-FP","price":1295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/spool-stage3-lpfp-s55.jpg?v=1781742593"},{"product_id":"tune-f87-m2-comp","title":"BMW F87 M2 Competition — Custom BM3 Tune (S55)","description":"\u003cp\u003e\u003cstrong\u003eLogged, verified, revised. Documented in writing. Yours to keep.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA custom bootmod3 calibration for the F87 (S55) — built from datalogs on your car, not a map off a shelf. We start from what your engine is actually doing in fuel trims, timing, knock, and load, and revise against the next log until the math and the data agree.\u003c\/p\u003e\n\u003ch3\u003eHow we approach it\u003c\/h3\u003e\n\u003cp\u003eMath first, datalogs second, marketing claims a distant last. We don’t publish dyno numbers we can’t reproduce; we tune to what your specific car does on the fuel you actually buy.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/configure\"\u003eConfigure your tune →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThe matched Stage Kit for this engine — components + the calibration sold as one decision — is the \u003ca href=\"\/products\/stage-2-kit-s55\"\u003eStage 2 Kit — S55\u003c\/a\u003e. 8% under buying the parts and tune à la carte.\u003c\/p\u003e","brand":"Esse Werks","offers":[{"title":"Stage 1","offer_id":43280699293757,"sku":"EW-TUNE-F87-M2-COMP-S1","price":495.0,"currency_code":"USD","in_stock":true},{"title":"Stage 2","offer_id":43280699326525,"sku":"EW-TUNE-F87-M2-COMP-S2","price":595.0,"currency_code":"USD","in_stock":true},{"title":"Stage 3","offer_id":43280699359293,"sku":"EW-TUNE-F87-M2-COMP-S3","price":895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/tune-card-s55_d1ceac2e-589e-4fad-a553-effcd3f0f14c.png?v=1781742508"},{"product_id":"spool-stage3-lpfp-n55","title":"Spool Performance Stage 3 Low-Pressure Fuel Pump — N55 (F-Chassis)","description":"\u003cp\u003e\u003cstrong\u003eSpool Performance Stage 3 low-pressure fuel pump for the F-chassis N55 — the in-tank side that keeps a Stage 3 build fed.\u003c\/strong\u003e A bigger high-pressure pump is only as good as what feeds it; the factory in-tank (low-pressure) pump runs out of duty on E85 and high boost, and rail pressure drops up top. Spool's Stage 3 adds a boost-activated secondary in-tank pump, roughly doubling low-pressure flow.\u003c\/p\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA twin-pump in-tank upgrade: the factory pump plus a second pump that switches on under boost — it ships with Spool's Hobbs (boost) switch for activation, so cruise stays factory-quiet and the system only ramps when you're on it. Spool rates it to support 1,200+ whp, and it's a complete drop-in replacement.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eLow-pressure (in-tank) side; it pairs with an upgraded high-pressure (DI) pump so the HPFP is never starved. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW N55 (F-chassis) — F20\/F21 M135i, F22\/F23 M235i, F30 335i, F32\/F33\/F36 435i, F87 M2. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eSourcing fueling with the tune? The \u003ca href=\"\/products\/fueling-kit-n55\"\u003eFueling Kit — N55\u003c\/a\u003e bundles the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"Spool Hobbs Switch","offer_id":43280702341181,"sku":"SP-BMFXXN-FP","price":935.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/Spool__fxx-n55-stage-3-low-pressure-fuel-pump__1.jpg?v=1781742211"},{"product_id":"aa-signature-downpipe-n55","title":"Active Autowerke Signature Downpipe — N55","description":"\u003cp\u003e\u003cstrong\u003eActive Autowerke catted downpipe for the N55 — the gating restriction opened, without going catless.\u003c\/strong\u003e Clears the factory downpipe\/cat choke point while keeping a high-flow converter in the pipe — the street-friendly path into Stage 2.\u003c\/p\u003e\n\u003ch3\u003eConstruction\u003c\/h3\u003e\n\u003cp\u003e3.5\" 304 stainless with a 4.5\" GESI G-Sport Ultra High Output catalytic converter — full stainless through the substrate, EPA-registered, 49-state \/ OBD2, no CEL. Not California-legal.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eDownpipe-side core of an N55 Stage 2 build; we tune around it. The \u003ca href=\"\/products\/stage-2-kit-n55\"\u003eStage 2 Kit — N55\u003c\/a\u003e bundles the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW N55 — M235i (F22\/F23), 335i (F30\/F31), 435i (F32\/F33\/F36), and F87 M2, 2014 and up. Confirm your chassis in the selector.\u003c\/p\u003e","brand":"Active Autowerke","offers":[{"title":"Catted (GESI)","offer_id":43280702439485,"sku":"11-040","price":1805.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/AA_f3x_f87-catted-downpipe_01.webp?v=1781743118"},{"product_id":"aa-downpipe-s55","title":"Active Autowerke Downpipes w\/ GESI Cats — S55","description":"\u003cp\u003e\u003cstrong\u003eActive Autowerke GESI-catted downpipes for the S55 — F80 M3, F82\/F83 M4, F87 M2 Competition.\u003c\/strong\u003e Clears the factory restriction on both turbos while keeping high-flow cats in the pipes.\u003c\/p\u003e\n\u003ch3\u003eConstruction\u003c\/h3\u003e\n\u003cp\u003eHand-built 304 stainless, TIG-welded, with a casted upper V-band for precise fitment and a pair of 4\" GESI G-Sport High Output (Gen 2) catalytic converters — rated for 500–850 hp, EPA-registered, 49-state \/ OBD2, no CEL. Not California-legal.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eDownpipe-side core of an S55 Stage 2 build; we tune around it. The \u003ca href=\"\/products\/stage-2-kit-s55\"\u003eStage 2 Kit — S55\u003c\/a\u003e bundles parts + calibration for 8% under à la carte.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW S55 — F80 M3, F82 M4, F83 M4 Convertible, F87 M2 Competition. Confirm your chassis in the selector.\u003c\/p\u003e","brand":"Active Autowerke","offers":[{"title":"Catted (GESI)","offer_id":43280704241725,"sku":"11-080","price":3515.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/aa-downpipe-s55-gesi-01.webp?v=1781743119"},{"product_id":"xona-xrc5764s-n55","title":"Xona XRC5764S — N55","description":"\u003cp\u003eThe Xona XRC5764S is a ball-bearing turbocharger built on the XR64S UHF 64mm turbine wheel. Compressor: 57mm inducer \/ 79mm exducer; 74 lb\/min rated flow; published range 450–740HP. Xona rates the XR64S UHF design as delivering the fastest response observed at this power level, attributed to the splitter-blade aero's inertia reduction. Configured here for the BMW N55.\u003c\/p\u003e\n\u003cp\u003eTurbine housing — Material, Flange, and A\/R — is selected using the guided cascade above. Compressor cover (X2C or X3C) and SwainTech coating are also selected above.\u003c\/p\u003e\n\u003cp\u003eSwainTech White Lightning thermal barrier coating is available on the turbine housing (hot side), compressor housing (cold side), or both — add it via the Coating option. Ordered BYO Core? We will contact you after purchase with shipping instructions. 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Compressor Housing (cold side)","offer_id":43280706732093,"sku":null,"price":2836.4,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · T3 · .63 \/ X2C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280706764861,"sku":null,"price":2986.4,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · T3 · .82 \/ X2C \/ No Coating","offer_id":43280706797629,"sku":null,"price":2636.4,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · T3 · .82 \/ X2C \/ Turbine Housing (hot side)","offer_id":43280706830397,"sku":null,"price":2836.4,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · T3 · .82 \/ X2C \/ Compressor Housing (cold side)","offer_id":43280706863165,"sku":null,"price":2836.4,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · T3 · .82 \/ X2C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280706895933,"sku":null,"price":2986.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T3 · .85 \/ X2C \/ Turbine Housing (hot side)","offer_id":43280706928701,"sku":null,"price":2578.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T3 · .85 \/ X2C \/ Compressor Housing (cold side)","offer_id":43280706961469,"sku":null,"price":2578.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T3 · .85 \/ X2C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280706994237,"sku":null,"price":2728.4,"currency_code":"USD","in_stock":false},{"title":"Super Core Only \/ X3C \/ Turbine Housing (hot side)","offer_id":43280707027005,"sku":null,"price":2448.8,"currency_code":"USD","in_stock":false},{"title":"Super Core Only \/ X3C \/ Compressor Housing (cold side)","offer_id":43280707059773,"sku":null,"price":2448.8,"currency_code":"USD","in_stock":false},{"title":"Super Core Only \/ X3C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280707092541,"sku":null,"price":2598.8,"currency_code":"USD","in_stock":false},{"title":"Super Core Only \/ X2C \/ No Coating","offer_id":43280707125309,"sku":null,"price":2078.4,"currency_code":"USD","in_stock":false},{"title":"Super Core Only \/ X2C \/ Turbine Housing (hot side)","offer_id":43280707158077,"sku":null,"price":2278.4,"currency_code":"USD","in_stock":false},{"title":"Super Core Only \/ X2C \/ Compressor Housing (cold side)","offer_id":43280707190845,"sku":null,"price":2278.4,"currency_code":"USD","in_stock":false},{"title":"Super Core Only \/ X2C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280707223613,"sku":null,"price":2428.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T4 Open · .81 \/ X2C \/ No Coating","offer_id":43280707256381,"sku":null,"price":2498.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T4 Open · .81 \/ X2C \/ Turbine Housing (hot side)","offer_id":43280707289149,"sku":null,"price":2698.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T4 Open · .81 \/ X2C \/ Compressor Housing (cold side)","offer_id":43280707321917,"sku":null,"price":2698.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T4 Open · .81 \/ X2C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280707354685,"sku":null,"price":2848.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T4 Open · .96 \/ X2C \/ No Coating","offer_id":43280707387453,"sku":null,"price":2498.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T4 Open · .96 \/ X2C \/ Turbine Housing (hot side)","offer_id":43280707420221,"sku":null,"price":2698.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T4 Open · .96 \/ X2C \/ Compressor Housing (cold side)","offer_id":43280707452989,"sku":null,"price":2698.4,"currency_code":"USD","in_stock":false},{"title":"Iron · T4 Open · .96 \/ X2C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280707485757,"sku":null,"price":2848.4,"currency_code":"USD","in_stock":false},{"title":"BYO Core — send us your housing \/ X3C \/ No Coating","offer_id":43280707518525,"sku":null,"price":2843.4,"currency_code":"USD","in_stock":false},{"title":"BYO Core — send us your housing \/ X3C \/ Turbine Housing (hot side)","offer_id":43280707551293,"sku":null,"price":3043.4,"currency_code":"USD","in_stock":false},{"title":"BYO Core — send us your housing \/ X3C \/ Compressor Housing (cold side)","offer_id":43280707584061,"sku":null,"price":3043.4,"currency_code":"USD","in_stock":false},{"title":"BYO Core — send us your housing \/ X3C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280707616829,"sku":null,"price":3193.4,"currency_code":"USD","in_stock":false},{"title":"BYO Core — send us your housing \/ X2C \/ No Coating","offer_id":43280707649597,"sku":null,"price":2673.4,"currency_code":"USD","in_stock":false},{"title":"BYO Core — send us your housing \/ X2C \/ Turbine Housing (hot side)","offer_id":43280707682365,"sku":null,"price":2873.4,"currency_code":"USD","in_stock":false},{"title":"BYO Core — send us your housing \/ X2C \/ Compressor Housing (cold side)","offer_id":43280707715133,"sku":null,"price":2873.4,"currency_code":"USD","in_stock":false},{"title":"BYO Core — send us your housing \/ X2C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280707747901,"sku":null,"price":3023.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/Xona_XRC5764S_01.webp?v=1781743119"},{"product_id":"csf-ic-n55-fchassis","title":"CSF Stepped-Core Intercooler — N55 (F2x \/ F3x \/ F87 M2)","description":"\u003cp\u003e\u003cstrong\u003eCSF stepped-core front-mount intercooler for the N55 — a direct air-to-air upgrade for the F2x\/F3x and F87 M2.\u003c\/strong\u003e Unlike the water-to-air cars, the N55 cools its charge air with a front-mount intercooler; the OEM core heat-soaks under repeat pulls and bleeds power as intake temps rise.\u003c\/p\u003e\n\u003ch3\u003eWhat CSF changes\u003c\/h3\u003e\n\u003cp\u003eCSF's stepped-core design fills the available opening more completely than a flat core — they call it the largest drop-in intercooler in the class. Bar-and-plate core, rounded cast end-tanks, developed in CSF's wind tunnel and 3D-scanned for fit. CSF measures intake temps about 38°F (21°C) lower than stock after three consecutive pulls. Fully reversible to OEM.\u003c\/p\u003e\n\u003ch3\u003eFinishes\u003c\/h3\u003e\n\u003cp\u003eWe spec these with a \u003cstrong\u003eThermal Heat Dispersion coating by default\u003c\/strong\u003e — an emissivity coating that helps the core radiate heat away, which is exactly what you want on a cooler. Prefer to skip it? Raw or Black are available for less. Choose above.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eN55 — F30\/F31\/F34 335i, F32\/F33\/F36 435i, F22\/F23 M235i, and F87 M2 (N55, 2016–2018). Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eThis is the intercooler-side core of an N55 Stage 2 build. The \u003ca href=\"\/products\/stage-2-kit-n55\"\u003eStage 2 Kit — N55\u003c\/a\u003e packages the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"CSF","offers":[{"title":"Thermal Heat Dispersion","offer_id":43280708468797,"sku":"CSF 8115","price":895.0,"currency_code":"USD","in_stock":true},{"title":"Raw","offer_id":43280708501565,"sku":"CSF 8115","price":695.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43280708534333,"sku":"CSF 8115B","price":695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/CSF_intercooler_F87m2_n55.webp?v=1781742886"},{"product_id":"csf-cac-s55","title":"CSF Top-Mount Charge-Air-Cooler — S55 (F80 M3 \/ F82 M4 \/ F87 M2 Competition)","description":"\u003cp\u003e\u003cstrong\u003eCSF top-mount charge-air cooler for the S55 — F80 M3, F82\/F83 M4, F87 M2 Competition.\u003c\/strong\u003e This is the water-to-air charge cooler that sits atop the engine; CSF calls it the first cast-end-tank top-mount unit for the S55. It pairs with the front heat exchanger to control intake temps.\u003c\/p\u003e\n\u003ch3\u003eWhat CSF changes\u003c\/h3\u003e\n\u003cp\u003eA core about 60% larger than OEM with cast hot- and cold-side end tanks and internal air dividers, run as a dual-pass, cross-flow design with two-stage water cooling (the OEM unit is single-pass, vertical-flow). 3D-scanned for a drop-in fit, with OEM quick-connect water connections and sensor ports.\u003c\/p\u003e\n\u003ch3\u003eFinishes\u003c\/h3\u003e\n\u003cp\u003eDefault is the \u003cstrong\u003eThermal Heat Dispersion coating\u003c\/strong\u003e — an emissivity coating that helps the part shed heat. Also available Raw, or in Esse Werks colors — Black, White, or Orange. Choose above.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eS55 — F80 M3, F82 M4, F83 M4 Convertible, F87 M2 Competition. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eThis is the charge-cooler-side core of an S55 Stage 2 build. The \u003ca href=\"\/products\/stage-2-kit-s55\"\u003eStage 2 Kit — S55\u003c\/a\u003e packages the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"CSF","offers":[{"title":"Thermal Heat Dispersion","offer_id":43280710729789,"sku":"CSF 8082","price":2295.0,"currency_code":"USD","in_stock":true},{"title":"Raw","offer_id":43280710762557,"sku":"CSF 8082R","price":2095.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43280710795325,"sku":"CSF 8082","price":2095.0,"currency_code":"USD","in_stock":true},{"title":"White","offer_id":43280710828093,"sku":"CSF 8082","price":2295.0,"currency_code":"USD","in_stock":true},{"title":"Orange","offer_id":43280710860861,"sku":"CSF 8082","price":2295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/csf-cac-s55.webp?v=1781742887"},{"product_id":"airtec-fmic-n55","title":"AIRTEC Intercooler Upgrade — BMW N55","description":"\u003cp\u003e\u003cstrong\u003eAIRTEC front-mount intercooler for the BMW N55.\u003c\/strong\u003e The OEM cooler heat-soaks under sustained boost; AIRTEC's larger core holds charge temps run after run, where the factory unit's recovery time is the limit.\u003c\/p\u003e\n\u003ch3\u003eConstruction\u003c\/h3\u003e\n\u003cp\u003eStepped twin-core — 600mm × 210mm × 140\/40mm, 14.0 litres against the OEM 7.3 litres (a 73% capacity increase) with 90% more frontal area. Cast alloy end tanks, CNC pipe connections, Pro-Series black powder-coat. Direct fit, complete with fixtures and instructions.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW N55 — M135i (F20\/F21), M235i (F22\/F23), 335i (F30\/F31\/F34), 435i (F32\/F36), and F87 M2. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003eAIRTEC 3-year, unlimited mileage. Part no. ATINTBMW4.\u003c\/p\u003e\n\u003cp\u003eIntercooler-side core of an N55 Stage 2 build. The \u003ca href=\"\/products\/stage-2-kit-n55\"\u003eStage 2 Kit — N55\u003c\/a\u003e bundles the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"AIRTEC Motorsport","offers":[{"title":"Pro-Series Black","offer_id":43280711614525,"sku":"ATINTBMW4","price":1435.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/airtec-fmic-n55.webp?v=1781742886"},{"product_id":"tune-f87-m2-n55","title":"BMW F87 M2 (N55) — Custom BM3 Tune","description":"\u003cp\u003e\u003cstrong\u003eLogged, verified, revised. Documented in writing. Yours to keep.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA custom bootmod3 calibration for the F87 (N55) — built from datalogs on your car, not a map off a shelf. We start from what your engine is actually doing in fuel trims, timing, knock, and load, and revise against the next log until the math and the data agree.\u003c\/p\u003e\n\u003ch3\u003eHow we approach it\u003c\/h3\u003e\n\u003cp\u003eMath first, datalogs second, marketing claims a distant last. We don’t publish dyno numbers we can’t reproduce; we tune to what your specific car does on the fuel you actually buy.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/configure\"\u003eConfigure your tune →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eThe matched Stage Kit for this engine — components + the calibration sold as one decision — is the \u003ca href=\"\/products\/stage-2-kit-n55\"\u003eStage 2 Kit — N55\u003c\/a\u003e. 8% under buying the parts and tune à la carte.\u003c\/p\u003e","brand":"Esse Werks","offers":[{"title":"Stage 1","offer_id":43280711974973,"sku":"EW-TUNE-F87-M2-N55-S1","price":495.0,"currency_code":"USD","in_stock":true},{"title":"Stage 2","offer_id":43280712007741,"sku":"EW-TUNE-F87-M2-N55-S2","price":595.0,"currency_code":"USD","in_stock":true},{"title":"Stage 3","offer_id":43280712040509,"sku":"EW-TUNE-F87-M2-N55-S3","price":895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/tune-card-n55_7fcbc9a1-4348-4327-9990-23c955204b21.png?v=1781742406"},{"product_id":"airtec-chargecooler-s55","title":"AIRTEC Billet Chargecooler Upgrade — S55","description":"\u003cp\u003e\u003cstrong\u003eAIRTEC billet chargecooler upgrade for the S55 — F80 M3, F82\/F83 M4, F87 M2 Competition.\u003c\/strong\u003e The S55 is air-to-water charge-cooled, and the OEM chargecooler heat-soaks on sustained boost. AIRTEC's larger-volume unit holds intake temps run after run.\u003c\/p\u003e\n\u003ch3\u003eConstruction\u003c\/h3\u003e\n\u003cp\u003e287mm × 190mm × 118mm — 6.43 litres against the OEM 2.85 litres (a 125% volume increase) with 45% more frontal area. High-flow one-piece cast end tanks with internal deflectors; connects to all OEM fittings (top-mount location retained). High-quality black powder-coat.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW S55 — F80 M3 and F82\/F83 M4 (direct fit); F87 M2 Competition (requires minor trimming of the underside of the bonnet for clearance). Confirm your chassis.\u003c\/p\u003e\n\u003cp\u003ePart no. ATINTBMW6. Pairs with the AIRTEC chargecooler radiator for the biggest gains. Chargecooler-side core of an S55 Stage 2 build — the \u003ca href=\"\/products\/stage-2-kit-s55\"\u003eStage 2 Kit — S55\u003c\/a\u003e bundles parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"AIRTEC Motorsport","offers":[{"title":"Default Title","offer_id":43280713580605,"sku":"ATINTBMW6","price":2755.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/airtec-billet-chargecooler-s55.webp?v=1781742886"},{"product_id":"airtec-chargecooler-radiator-s55","title":"AIRTEC Chargecooler Radiator Upgrade — S55","description":"\u003cp\u003e\u003cstrong\u003eAIRTEC chargecooler radiator (pre-rad) for the S55 — F80 M3, F82\/F83 M4, F87 M2 Competition.\u003c\/strong\u003e The front heat exchanger that feeds the S55's air-to-water charge-cooling loop. A bigger, cooler-running pre-rad keeps coolant temps down so the chargecooler can keep doing its job on long pulls.\u003c\/p\u003e\n\u003ch3\u003eConstruction\u003c\/h3\u003e\n\u003cp\u003eTwin-pass design, 540mm × 410mm × 45mm — 9.9 litres, more than double the OEM 4.5 litres, with roughly 40% more frontal area. Uses OEM mounts and coolant connectors; includes a removable stone guard and full fitting kit. Black powder-coat.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW S55 — F80 M3, F82\/F83 M4, F87 M2 Competition. Confirm your chassis.\u003c\/p\u003e\n\u003cp\u003ePart no. ATRADBMW1. Pairs with the AIRTEC billet chargecooler. Heat-exchanger-side core of an S55 Stage 2 build — the \u003ca href=\"\/products\/stage-2-kit-s55\"\u003eStage 2 Kit — S55\u003c\/a\u003e bundles parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"AIRTEC Motorsport","offers":[{"title":"Default Title","offer_id":43280713613373,"sku":"ATINT-S55-RAD","price":1695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/airtec-billet-chargecooler-s55-02.webp?v=1781742886"},{"product_id":"csf-hx-s55","title":"CSF Front-Mount Heat Exchanger — S55 (F80 M3 \/ F82 M4 \/ F87 M2 Competition)","description":"\u003cp\u003e\u003cstrong\u003eCSF front-mount heat exchanger for the S55 — F80 M3, F82\/F83 M4, and F87 M2 Competition.\u003c\/strong\u003e The S55 runs an air-to-water charge-cooling system, and heat rejection at the front exchanger is the bigger of its two weak points. The factory unit gives up once boost and ambient climb, letting intake temps creep across back-to-back pulls.\u003c\/p\u003e\n\u003ch3\u003eWhat CSF changes\u003c\/h3\u003e\n\u003cp\u003eA 2-row, 42mm dual core with B-Tube geometry run as a dual-pass design — the coolant crosses the core twice before it leaves. CNC quick-connect fittings, a removable aluminum rock guard, and an aluminum drain plug. Drop-in fit in the factory location.\u003c\/p\u003e\n\u003ch3\u003eFinishes\u003c\/h3\u003e\n\u003cp\u003eWe spec these with a \u003cstrong\u003eThermal Heat Dispersion coating by default\u003c\/strong\u003e — an emissivity coating that helps the core radiate heat away, which is exactly what you want on a cooler. Prefer to skip it? Raw or Black are available for less. Choose above.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eS55 — F80 M3, F82 M4, F83 M4 Convertible, F87 M2 Competition. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eThis is the heat-exchanger-side core of an S55 Stage 2 build. The \u003ca href=\"\/products\/stage-2-kit-s55\"\u003eStage 2 Kit — S55\u003c\/a\u003e packages the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"CSF","offers":[{"title":"Thermal Heat Dispersion","offer_id":43280714793021,"sku":"CSF 8075","price":1105.0,"currency_code":"USD","in_stock":true},{"title":"Raw","offer_id":43280714825789,"sku":"CSF 8075","price":905.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":43280714858557,"sku":"CSF 8075V","price":905.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/csf-hx-s55.webp?v=1781742886"},{"product_id":"fuelit-stage2-lpfp-n55-n20-fchassis","title":"Fuel-It! Stage 2 LPFP — N55 \/ N20 (F-Chassis)","description":"\u003cp\u003e\u003cstrong\u003eFuel-It! Stage 2 low-pressure fuel pump for the F-chassis N55\/N20 — a drop-in in-tank upgrade that feeds a Stage 2\/3 build.\u003c\/strong\u003e The factory in-tank pump runs out of duty on E85 and higher boost, starving the high-pressure pump up top. This replaces the stock pump with an E85-rated Walbro.\u003c\/p\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA complete drop-in assembly with a Walbro 450 (about 50% more flow than stock); a Walbro 525 (~65%) is available. Single pump. Because it draws more current than stock, a tired EKP (the factory pump controller) can run warm on a hard-driven car — for sustained high-power\/E85 use, step up to the dual-pump Stage 3.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eLow-pressure (in-tank) side; it keeps an upgraded high-pressure pump fed. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eF-chassis N55\/N20 — F20\/F21, F22\/F23, F87 M2, F30\/F31, F32\/F33. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eSourcing fueling with the tune? The \u003ca href=\"\/products\/fueling-kit-n55\"\u003eFueling Kit — N55\u003c\/a\u003e bundles the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Fuel-It!","offers":[{"title":"Walbro 450","offer_id":43280715087933,"sku":"FI-LPFP-S2-F","price":815.0,"currency_code":"USD","in_stock":true},{"title":"Walbro 525","offer_id":43280715120701,"sku":"FI-LPFP-S2-F-525","price":890.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/FuelIt__fuel-it-bmw-f2x-f3x-f87-n55-m2-walbro-stage-2-lpfp-upgrade__1_abd2d81e-948a-4683-bbbf-ac7e79094bdd.jpg?v=1781742108"},{"product_id":"mishimoto-charge-pipe-s55","title":"Mishimoto Performance Charge Pipe Kit — S55","description":"\u003cp\u003e\u003cstrong\u003eMishimoto performance charge pipe kit for the S55 — F80 M3, F82\/F83 M4, F87 M2 Competition.\u003c\/strong\u003e Full-aluminum, TIG-welded replacement for the failure-prone OEM plastic charge pipe.\u003c\/p\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eTwo TIG-welded aluminum charge pipes with a cast midsection for exact fitment, two matte-black silicone couplers, and clamps. Includes a bung for methanol injection. \u003cstrong\u003eCARB-exempt (EO# D-759-13) — 50-state street legal.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWhere it fits\u003c\/h3\u003e\n\u003cp\u003eInduction-side hardware on an S55 Stage 2 build — we tune to the supporting mods.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW S55 — F80 M3, F82\/F83 M4, F87 M2 Competition (2015–2020). Confirm your chassis.\u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003eMishimoto Lifetime Warranty. Part no. MMICP-F80-15.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"\/products\/stage-2-kit-s55\"\u003eStage 2 Kit — S55\u003c\/a\u003e bundles parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Mishimoto","offers":[{"title":"Wrinkle Black","offer_id":43280716070973,"sku":"MMICP-F80-15","price":615.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/mishimoto-charge-pipe-s55.webp?v=1781742886"},{"product_id":"xona-xrc5964s-s63","title":"Xona XRC5964S — S63 Matched Pair (×2)","description":"\u003cp\u003eThe Xona XRC5964S is a ball-bearing turbocharger built on the XR64S UHF 64mm turbine wheel. Compressor: 59.3mm inducer \/ 82mm exducer; 80 lb\/min rated flow; published range 370–800HP. This listing is a matched pair for the S63\/S63TU — price covers two identical turbos, one per bank, with both units configured from the housing options selected above.\u003c\/p\u003e\n\u003cp\u003eAll prices shown are for the complete matched pair. Turbine housing, compressor cover, and coating are selected above. Coating pricing shown covers both units.\u003c\/p\u003e\n\u003cp\u003eSwainTech White Lightning thermal barrier coating is available on the turbine housings (hot side), compressor housings (cold side), or all four housings — pricing shown is per the matched pair. Ordered BYO Core? We will contact you after purchase. Ship both cores together with your order number on the box. Approximately three-week build turnaround from receipt.\u003c\/p\u003e","brand":"Xona Rotor","offers":[{"title":"TiAL Stainless · V-Band · .82 ★ \/ X3C \/ No Coating","offer_id":43280718594109,"sku":null,"price":5731.2,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · V-Band · .82 ★ \/ X3C \/ Turbine Housing (hot side)","offer_id":43280718626877,"sku":null,"price":6131.2,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · V-Band · .82 ★ \/ X3C \/ Compressor Housing (cold side)","offer_id":43280718659645,"sku":null,"price":6131.2,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · V-Band · .82 ★ \/ X3C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280718692413,"sku":null,"price":6431.2,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · V-Band · .82 ★ \/ X2C \/ No Coating","offer_id":43280718725181,"sku":null,"price":5390.4,"currency_code":"USD","in_stock":false},{"title":"TiAL Stainless · V-Band · .82 ★ \/ X2C \/ 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housing \/ X2C \/ Compressor Housing (cold side)","offer_id":43280721674301,"sku":null,"price":5746.8,"currency_code":"USD","in_stock":false},{"title":"BYO Core — send us your housing \/ X2C \/ Both Turbine \u0026 Compressor Housings","offer_id":43280721707069,"sku":null,"price":6046.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/Xona_XRC5964S_pair_01.webp?v=1781743119"},{"product_id":"fuelit-stage3-lpfp-n55-n20-fchassis","title":"Fuel-It! Stage 3 Dual LPFP — N55 \/ N20 (F-Chassis)","description":"\u003cp\u003e\u003cstrong\u003eFuel-It! Stage 3 dual low-pressure fuel pump for the F-chassis N55\/N20 — the high-power, E85 answer on the in-tank side.\u003c\/strong\u003e Instead of replacing the stock pump, it keeps the factory primary (so the EKP behaves normally) and adds a second Walbro that runs only under boost.\u003c\/p\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA dual-pump kit: the stock LPFP plus a secondary Walbro 450 (525 optional) on a secondary harness, triggered under boost by a Hobbs switch — so cruise stays factory and the system only ramps when you're on it. This sidesteps the current-draw limit of a single big pump.\u003c\/p\u003e\n\u003ch3\u003eOptions\u003c\/h3\u003e\n\u003cp\u003eTwo choices in the configurator. \u003cstrong\u003eSecondary Pump:\u003c\/strong\u003e the Walbro 450 covers most Stage 3 E85 builds; step up to the higher-flow Walbro 525 for bigger power targets. \u003cstrong\u003eTrigger:\u003c\/strong\u003e a Hobbs switch is a boost-pressure switch that brings the secondary pump online at its rated boost — the 4 PSI switch brings it in early, low in the boost curve, while the 15 PSI switch brings it in higher up. Choose \"No Hobbs switch\" if your build switches the secondary pump another way.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eLow-pressure (in-tank) side; feeds an upgraded high-pressure pump on a Stage 3 build. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eF-chassis N55\/N20 — F20\/F21, F22\/F23, F87 M2, F30\/F31, F32\/F33. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eSourcing fueling with the tune? The \u003ca href=\"\/products\/fueling-kit-n55\"\u003eFueling Kit — N55\u003c\/a\u003e bundles the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Fuel-It!","offers":[{"title":"Walbro 450 \/ No Hobbs switch","offer_id":43280732258365,"sku":"FI-LPFP-S3-F","price":1085.0,"currency_code":"USD","in_stock":true},{"title":"Walbro 450 \/ 4 PSI Hobbs switch","offer_id":43280732291133,"sku":"FI-LPFP-S3-F-H4","price":1120.0,"currency_code":"USD","in_stock":true},{"title":"Walbro 450 \/ 15 PSI Hobbs switch","offer_id":43280732323901,"sku":"FI-LPFP-S3-F-H15","price":1120.0,"currency_code":"USD","in_stock":true},{"title":"Walbro 525 \/ No Hobbs switch","offer_id":43280732356669,"sku":"FI-LPFP-S3-F-525","price":1160.0,"currency_code":"USD","in_stock":true},{"title":"Walbro 525 \/ 4 PSI Hobbs switch","offer_id":43280732389437,"sku":"FI-LPFP-S3-F-525-H4","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"Walbro 525 \/ 15 PSI Hobbs switch","offer_id":43280732422205,"sku":"FI-LPFP-S3-F-525-H15","price":1195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/FuelIt__fuel-it-bmw-f-chassis-n55-n20-stage-3-lpfp-upgrade__1_42aa864e-a98c-4c58-af87-b5a8cd549883.jpg?v=1781742108"},{"product_id":"fuelit-pi-kit-n55","title":"Fuel-It! Port Injection Kit — N55 (F-Chassis)","description":"\u003cp\u003e\u003cstrong\u003eFuel-It! port injection kit for the F-chassis N55 — a supplemental fuel system for when direct injection runs out.\u003c\/strong\u003e It adds low-pressure port injection across all six intake runners to back up the maxed-out factory DI, opening the door to big E85\/methanol power (Fuel-It rates the system up to 1,000+ whp with the right injectors).\u003c\/p\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eCNC-machined manifold spacers (or a full replacement manifold), a billet fuel rail, up to six flow-matched port injectors (sized to your choice, or bring your own), a fuel-line adapter, and a port-injection controller. It supplements — not replaces — the factory direct injection; the injector size you run sets the power ceiling, and the controller meters the port fuel.\u003c\/p\u003e\n\u003ch3\u003eOptions\u003c\/h3\u003e\n\u003cp\u003eTwo choices in the configurator. \u003cstrong\u003eInjector:\u003c\/strong\u003e take the kit with No injectors to reuse or supply your own, or pick 550, 750, 950, or 1050cc — step up the size as your target output climbs. \u003cstrong\u003eController:\u003c\/strong\u003e Standard, or the CANfuel Sequential — Fuel-It's CAN-bus sequential controller for finer per-cylinder metering.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eSupplemental fuel for high-E85 \/ high-power N55 builds where the DI pump is the limit. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eBMW N55 (F-chassis) — M135i, M235i, M2, 335i, 435i. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eSourcing fueling with the tune? The \u003ca href=\"\/products\/fueling-kit-n55\"\u003eFueling Kit — N55\u003c\/a\u003e bundles the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Fuel-It!","offers":[{"title":"No injectors \/ Standard","offer_id":43280734650429,"sku":"FI-PI-N55","price":515.0,"currency_code":"USD","in_stock":true},{"title":"No injectors \/ CANfuel Sequential","offer_id":43280734683197,"sku":"FI-PI-N55-SEQ","price":1014.0,"currency_code":"USD","in_stock":true},{"title":"550cc \/ Standard","offer_id":43280734715965,"sku":"FI-PI-N55-I550","price":804.0,"currency_code":"USD","in_stock":true},{"title":"550cc \/ CANfuel Sequential","offer_id":43280734748733,"sku":"FI-PI-N55-I550-SEQ","price":1303.0,"currency_code":"USD","in_stock":true},{"title":"750cc \/ Standard","offer_id":43280734781501,"sku":"FI-PI-N55-I750","price":904.0,"currency_code":"USD","in_stock":true},{"title":"750cc \/ CANfuel Sequential","offer_id":43280734814269,"sku":"FI-PI-N55-I750-SEQ","price":1403.0,"currency_code":"USD","in_stock":true},{"title":"950cc \/ Standard","offer_id":43280734847037,"sku":"FI-PI-N55-I950","price":1004.0,"currency_code":"USD","in_stock":true},{"title":"950cc \/ CANfuel Sequential","offer_id":43280734879805,"sku":"FI-PI-N55-I950-SEQ","price":1503.0,"currency_code":"USD","in_stock":true},{"title":"1050cc \/ Standard","offer_id":43280734912573,"sku":"FI-PI-N55-I1050","price":1414.0,"currency_code":"USD","in_stock":true},{"title":"1050cc \/ CANfuel Sequential","offer_id":43280734945341,"sku":"FI-PI-N55-I1050-SEQ","price":1913.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/fuelit_n55_port_injection_kit.webp?v=1781742887"},{"product_id":"fuelit-pi-s55","title":"Fuel-It! 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It supplements, not replaces, the factory DI; injector size sets the ceiling.\u003c\/p\u003e\n\u003ch3\u003eOptions\u003c\/h3\u003e\n\u003cp\u003eTwo choices in the configurator. \u003cstrong\u003eInjector\u003c\/strong\u003e — choose \"No injectors\" to reuse your existing set or supply your own, or pick 550 \/ 750 \/ 950 \/ 1050cc; injector size sets the power ceiling, so size it to your fuel and target. \u003cstrong\u003eController\u003c\/strong\u003e — select Standard, or step up to the CANfuel Sequential, Fuel-It's CAN-bus sequential controller for finer fuel control. Make both selections above.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eSupplemental fuel for high-power S55 builds. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eS55 — F80 M3, F82 M4, F83 M4 Convertible, F87 M2 Competition. Confirm your chassis in the selector.\u003c\/p\u003e\n\u003cp\u003eSourcing fueling with the tune? The \u003ca href=\"\/products\/fueling-kit-s55\"\u003eFueling Kit — S55\u003c\/a\u003e bundles the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Fuel-It!","offers":[{"title":"No injectors \/ Standard","offer_id":43280735043645,"sku":"FI-PI-S55","price":1305.0,"currency_code":"USD","in_stock":true},{"title":"No injectors \/ CANfuel Sequential","offer_id":43280735076413,"sku":"FI-PI-S55-SEQ","price":1804.0,"currency_code":"USD","in_stock":true},{"title":"550cc \/ Standard","offer_id":43280735109181,"sku":"FI-PI-S55-I550","price":1594.0,"currency_code":"USD","in_stock":true},{"title":"550cc \/ CANfuel Sequential","offer_id":43280735141949,"sku":"FI-PI-S55-I550-SEQ","price":2093.0,"currency_code":"USD","in_stock":true},{"title":"750cc \/ Standard","offer_id":43280735174717,"sku":"FI-PI-S55-I750","price":1694.0,"currency_code":"USD","in_stock":true},{"title":"750cc \/ CANfuel Sequential","offer_id":43280735207485,"sku":"FI-PI-S55-I750-SEQ","price":2193.0,"currency_code":"USD","in_stock":true},{"title":"950cc \/ Standard","offer_id":43280735240253,"sku":"FI-PI-S55-I950","price":1794.0,"currency_code":"USD","in_stock":true},{"title":"950cc \/ CANfuel Sequential","offer_id":43280735273021,"sku":"FI-PI-S55-I950-SEQ","price":2293.0,"currency_code":"USD","in_stock":true},{"title":"1050cc \/ Standard","offer_id":43280735305789,"sku":"FI-PI-S55-I1050","price":2204.0,"currency_code":"USD","in_stock":true},{"title":"1050cc \/ CANfuel Sequential","offer_id":43280735338557,"sku":"FI-PI-S55-I1050-SEQ","price":2703.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/fuelit_s55_port_injection_kit.webp?v=1781742887"},{"product_id":"xona-xrc5964s-n55","title":"Xona XRC5964S — N55","description":"\u003cp\u003eThe Xona XRC5964S is a ball-bearing turbocharger built on the XR64S UHF 64mm turbine wheel. 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