{"product_id":"er-s58-x3m-x4m-mid-pipes","title":"Evolution Racewerks Competition Series Mid Pipes — S58 F97 X3 M \/ F98 X4 M","description":"\u003cp\u003e\u003cstrong\u003eEvolution Racewerks Competition Series mid pipes for the S58 in the F97 X3 M and F98 X4 M SUVs.\u003c\/strong\u003e The SUV chassis routes exhaust through a longer overall path than the M3\/M4 sedan\/coupe — different mounting points, different chassis tunnel clearances. ER engineered a chassis-specific mid pipe for this application. 3\" mandrel-bent T304 stainless, H-crossover, lifetime warranty.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's different about the X3M\/X4M chassis\u003c\/h3\u003e\n\u003cp\u003eThe SUV body sits taller — the exhaust system runs through a chassis tunnel that's geometrically different from the M3\/M4 sedan. Mid pipe length is approximately 8\" longer than the G80\/G82 version, with different hanger mounting points and different cross-member clearance. Not interchangeable with any other S58 application.\u003c\/p\u003e\n\n\u003ch3\u003eThe performance SUV use case\u003c\/h3\u003e\n\u003cp\u003eF97 X3 M and F98 X4 M owners using these mid pipes are typically running Stage 2+ calibration (strong gains) in a 4,500 lb SUV chassis. The exhaust note change is most aggressive of any S58 application because the SUV body has more interior cabin volume to amplify the note. Reads as a track-truck rather than a sedan.\u003c\/p\u003e\n\n\u003ch3\u003eH-crossover\u003c\/h3\u003e\n\u003cp\u003eSame architecture as the G80\/G82 and G87 variants — H crossover for drone reduction and low-end torque retention, deletes OEM resonators for flow.\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 in F97 X3 M and F98 X4 M chassis (Competition variants).\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":43280684417085,"sku":"EW-EXH-ER-S58-X3M-X4M","price":1535.0,"currency_code":"USD","in_stock":true},{"title":"SwainTech White Lightning","offer_id":43280684449853,"sku":"EW-EXH-ER-S58-X3M-X4M-CER","price":1785.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/er-s58-x3m-x4m-mid-pipes-01.webp?v=1781743119","url":"https:\/\/essewerks.com\/products\/er-s58-x3m-x4m-mid-pipes","provider":"Esse Werks","version":"1.0","type":"link"}