{"product_id":"er-s58-g80-g82-mid-pipes","title":"Evolution Racewerks Competition Series Mid Pipes — S58 G80 M3 \/ G82 M4 \/ G83 M4 Conv","description":"\u003cp\u003e\u003cstrong\u003eEvolution Racewerks Competition Series mid pipes for the S58 in G80 M3, G82 M4, and G83 M4 Convertible.\u003c\/strong\u003e The S58's catalytic converters sit in the downpipe section (we offer those separately as catless or high-flow catted downpipes). This product is the mid-pipe: 3\" mandrel-bent T304 stainless replacing the OEM resonator-and-mid-pipe assembly. It deletes the resonators — the main restriction in the OEM mid section — and opens the flow path to the cat-back. Downpipe and mid-pipe are separate, complementary upgrades.\u003c\/p\u003e\n\n\u003ch3\u003eH-crossover (not X)\u003c\/h3\u003e\n\u003cp\u003eER deliberately specified an \"H\" style crossover instead of \"X\" — their testing showed the H-crossover reduces drone and improves low-end torque versus X-crossover designs. The OEM mid pipe also uses H-crossover; ER preserved that architecture choice. Result: aggressive exhaust note across the rev range, no drone at cruise.\u003c\/p\u003e\n\n\u003ch3\u003eAudible change\u003c\/h3\u003e\n\u003cp\u003eSignificant — the OEM resonators do a lot of the S58's exhaust note management. With them removed, the engine note is noticeably more aggressive at all RPM bands. Driver experience changes; neighbors notice when you start the car.\u003c\/p\u003e\n\n\u003ch3\u003eShipping note\u003c\/h3\u003e\n\u003cp\u003eThe full 1-piece mid pipe exceeds UPS\/FedEx ground size limits — ER offers it in a 3-piece design for ground shipping (the standard option). Full 1-piece is available by truck freight (significantly higher shipping cost). We default to the 3-piece for UPS\/FedEx ground unless you specifically request the 1-piece.\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  \u003cli\u003eFree shipping in the continental US on orders over $100 from Evolution Racewerks (we pass that through — no shipping markup from us)\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\u003eS58 sedan\/coupe\/convertible — G80 M3, G82 M4, G83 M4 Convertible (Competition, Competition xDrive, base, CS).\u003c\/p\u003e\n\u003cp\u003eThis part is the mid-pipe-side core of every S58 Stage 2 build. The \u003ca href=\"\/products\/stage-2-kit-s58\"\u003eStage 2 Kit — S58\u003c\/a\u003e packages the matched parts + calibration for 8% under à la carte.\u003c\/p\u003e","brand":"Evolution Racewerks","offers":[{"title":"Brush Finish","offer_id":43280681992253,"sku":"EW-EXH-ER-S58-G8X","price":1415.0,"currency_code":"USD","in_stock":true},{"title":"SwainTech White Lightning","offer_id":43280682025021,"sku":"EW-EXH-ER-S58-G8X-CER","price":1665.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/er-s58-g87-m2-mid-pipes-01.webp?v=1781743118","url":"https:\/\/essewerks.com\/products\/er-s58-g80-g82-mid-pipes","provider":"Esse Werks","version":"1.0","type":"link"}