{"title":"Dorch Engineering","description":null,"products":[{"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-b48-b58-hpfp-upgrade","title":"Dorch Engineering B48 \/ B58 HPFP Upgrade","description":"\u003cp\u003e\u003cstrong\u003eDorch Engineering HPFP upgrades for the B48 and B58 platforms.\u003c\/strong\u003e Same part fits both engines — Dorch's HPFP cartridge is what any B48 or B58 build needs once it pushes Stage 2 calibration or above. The factory pump is sized for OEM boost; at Stage 2+ it can't sustain fuel rail pressure, which throws fuel pressure deviation codes and forces the calibration to pull timing.\u003c\/p\u003e\n\n\u003ch3\u003eThree stages\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGen1 DS15 Stage 1\u003c\/strong\u003e — Dorch's entry-level cartridge, more flow over OEM. Bolt-in replacement. The right pump for Stage 2 calibrations on stock turbo (B48) or Stage 1-2 on B58. Fits Gen1 B48\/B58 platforms (2014-2018 production roughly).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGen1 DS25 Stage 2.5\u003c\/strong\u003e — Dorch's higher-displacement cartridge for the same Gen1 pump body. The build path for Stage 3 B48 + Phantom I4 S2 hardware, or Stage 2.5 B58 builds running aggressive 93 octane or E-blend.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGen2 DS25 Stage 2.5\u003c\/strong\u003e — Same DS25 cartridge engineered for the Gen2 B58 pump body (2019+ production with the updated HPFP architecture). Confirm your specific year and chassis at intake — Gen1 vs Gen2 fitment is non-interchangeable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConfirm Gen1 vs Gen2 at intake\u003c\/h3\u003e\n\u003cp\u003eThe B58 platform received an updated HPFP design in late 2018 \/ early 2019 (varies by chassis and market). The Gen2 pump body is dimensionally different from the Gen1 — Dorch's cartridges are engineered specifically per generation. We confirm your pump generation at order intake based on VIN and production date before shipping.\u003c\/p\u003e\n\n\u003ch3\u003eFor the B48 specifically\u003c\/h3\u003e\n\u003cp\u003eThe B48 shares the HPFP body and cartridge design with the B58. Dorch markets these primarily for B58 applications, but they fit and function identically on B48 engines. Esse Werks confirms this fitment in our calibration database — we install these on B48 builds regularly.\u003c\/p\u003e\n\n\u003ch3\u003eInstall\u003c\/h3\u003e\n\u003cp\u003e~2-3 hours at a competent shop. HPFP accessible on top of the engine without intake manifold removal on most chassis. Bolt-in replacement. 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\u003eAll B48 and B58 applications across BMW F-series, G-series, and MINI F-series. Confirm chassis + production year at intake to select correct Gen1 vs Gen2 variant.\u003c\/p\u003e","brand":"Dorch Engineering","offers":[{"title":"Gen1 DS15 Stage 1 (~+15% Flow) \/ 1-4 Series Fitment","offer_id":43280686940221,"sku":"EW-FUEL-DORCH-B58-DS15","price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS15 Stage 1 (~+15% Flow) \/ 5-7 Series Fitment","offer_id":43280686972989,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS15 Stage 1 (~+15% Flow) \/ X3\/X4 Fitment","offer_id":43280687005757,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS25 Stage 2.5 (~+25% Flow, Gen1 Pumps) \/ 1-4 Series Fitment","offer_id":43280687038525,"sku":"EW-FUEL-DORCH-B58-DS25-G1","price":2485.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS25 Stage 2.5 (~+25% Flow, Gen1 Pumps) \/ 5-7 Series Fitment","offer_id":43280687071293,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS25 Stage 2.5 (~+25% Flow, Gen1 Pumps) \/ X3\/X4 Fitment","offer_id":43280687104061,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen2 DS25 Stage 2.5 (~+25% Flow, Gen2 Pumps 2019+) \/ 1-4 Series Fitment","offer_id":43280687136829,"sku":"EW-FUEL-DORCH-B58-DS25-G2","price":2545.0,"currency_code":"USD","in_stock":true},{"title":"Gen2 DS25 Stage 2.5 (~+25% Flow, Gen2 Pumps 2019+) \/ 5-7 Series Fitment","offer_id":43280687169597,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen2 DS25 Stage 2.5 (~+25% Flow, Gen2 Pumps 2019+) \/ X3\/X4 Fitment","offer_id":43280687202365,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/Dorch-B58-Gen2-Full-Kit.webp?v=1781742886"},{"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":"dorch-s58-flex-fuel-eca-kit","title":"Dorch Engineering S58 Flex Fuel ECA Kit","description":"\u003cp\u003e\u003cstrong\u003eDorch Engineering plug-and-play Flex Fuel ECA (Ethanol Content Adapter) kit for the S58.\u003c\/strong\u003e Reads ethanol content from a CAN-based Continental flex-fuel sensor and broadcasts the value directly to the DME — full flex fuel operation with no piggyback ECU, no datalog-and-flash dance, no fueling assumptions baked into the calibration.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this enables\u003c\/h3\u003e\n\u003cp\u003eThe S58 supports E85, E70, E30, and any pump-blend in between at the calibration level — but only if the DME knows the actual ethanol content of what's in the tank. Without a flex-fuel sensor, the calibration has to assume a fuel grade (typically 93 octane) and trim conservatively at sustained boost. With the Dorch ECA Kit installed and a Continental flex-fuel sensor in the fuel line, the DME reads ethanol percentage in real time and the Esse Werks Stage 2 \/ Stage 3 calibrations target full power on whatever blend you're running.\u003c\/p\u003e\n\n\u003ch3\u003eReal-world output difference\u003c\/h3\u003e\n\u003cp\u003eOwners running higher-ethanol blends report meaningfully more power than the same Stage 3 calibration on 93 octane — the flex-fuel infrastructure is what opens the upper end of the S58's tune-able envelope, because the DME is targeting real ethanol content instead of trimming around an assumed fuel grade.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDorch ECA controller (CAN-based, plug-and-play to the OEM DME wiring)\u003c\/li\u003e\n  \u003cli\u003eMounting hardware\u003c\/li\u003e\n  \u003cli\u003eInstallation documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat you ALSO need (sold separately)\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eContinental flex-fuel sensor — plumbed into the fuel feed line\u003c\/li\u003e\n  \u003cli\u003eStainless fuel line fittings to match your existing fuel system\u003c\/li\u003e\n  \u003cli\u003eA calibration that supports flex fuel (Esse Werks Stage 2 or 3 S58 with flex fuel option selected at intake)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstall\u003c\/h3\u003e\n\u003cp\u003eA workshop job at a competent shop — see the spec row for the estimated install time. The ECA controller mounts in the engine bay or under-trim area. Flex-fuel sensor installation requires a fuel line tap (best done at the fuel filter or rail inlet). Calibration re-flash after install to enable flex fuel maps.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003e2021-2026 BMW G80 M3, G82 M4, G83 M4 Convertible. 2023+ G87 M2. 2020+ F97 X3 M, F98 X4 M. Confirm chassis at intake.\u003c\/p\u003e\n\u003cp\u003eIf you're sourcing fueling alongside the calibration, the \u003ca href=\"\/products\/fueling-kit-s58\"\u003eFueling Kit — S58\u003c\/a\u003e bundles the matched parts + tune for 8% under à la carte.\u003c\/p\u003e","brand":"Dorch Engineering","offers":[{"title":"Default Title","offer_id":43280695459901,"sku":"EW-FUEL-DORCH-S58-FLEX","price":1045.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/dorch_S58-ECA.webp?v=1781742887"},{"product_id":"fueling-kit-b48","title":"Fueling Kit — B48","description":"\u003cp\u003e\u003cstrong\u003eFueling Kit — B48: the high-pressure pump, matched to a tune that uses it.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAn upgraded high-pressure fuel pump paired with a calibration written around the extra fuel it can deliver. The stock B48 HPFP runs out of headroom before the rest of the hardware does on higher-octane or ethanol-blend fuel; this set raises that ceiling and ships with the tune already matched to it, so the pump and the calibration arrive as one decision rather than two guesses.\u003c\/p\u003e\n\u003ch3\u003eWhat's in the set\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDorch Engineering B48 \/ B58 HPFP upgrade — a higher-flow high-pressure pump for fuel-limited builds.\u003c\/li\u003e\n\u003cli\u003eThe matched custom BM3 calibration for your chassis, written to use the added fuel delivery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy it ships together\u003c\/h3\u003e\n\u003cp\u003eA bigger pump with no tune to command it does nothing, and a calibration that asks for more fuel than the pump can supply will pull timing to stay safe. Matching the two is the whole point of the kit.\u003c\/p\u003e\n\u003ch3\u003eThe saving\u003c\/h3\u003e\n\u003cp\u003e8% under buying the pump and tune separately — the kit price reflects the matched build, not a discount gimmick. The savings indicator on this page shows the current figure.\u003c\/p\u003e\n\u003cp\u003eOne cart line; components ship as their individual SKUs.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/tunes-b48\"\u003eSee every B48 chassis tune →\u003c\/a\u003e\u003c\/p\u003e","brand":"Esse Werks","offers":[{"title":"Default Title","offer_id":43280697163837,"sku":null,"price":2622.0,"currency_code":"USD","in_stock":true}]}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/collections\/dorch_brand.svg?v=1781758285","url":"https:\/\/essewerks.com\/collections\/dorch-engineering.oembed","provider":"Esse Werks","version":"1.0","type":"link"}