{"product_id":"garage-whifbitz-3-5-stainless-steel-exhaust-m3-m4-f8x","title":"Garage Whifbitz Valved Cat Back Exhaust with 3.5 inch Single Mid Pipe\/Centre Section for BMW M3\/M4 F80 F","description":"\u003cp\u003e\u003cstrong\u003eGarage Whifbitz stainless rear system for BMW M3 and M4 F8X\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eGive your F8X a proper voice and a real performance lift with this Garage Whifbitz valve‑controlled rear exhaust. Built for the twin‑turbo S55, it delivers a deeper, smoother soundtrack with reduced rasp and an impressive real‑world power increase. We have supplied and fitted this setup on customer cars and it continues to impress for tone, drivability and quality, with carbon fibre quad tailpipes that look as good as they sound.\u003c\/p\u003e\n\n\u003ch3\u003eWhy enthusiasts choose this system\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eProven gain of around 12 bhp at the wheels on a standard S55\u003c\/li\u003e\n  \u003cli\u003eTwin 3 inch front sections merge into a single 3.5 inch centre for superb flow\u003c\/li\u003e\n  \u003cli\u003eValve‑controlled rear section keeps factory valve operation and character\u003c\/li\u003e\n  \u003cli\u003eDrive mode integration: calm in Efficient, assertive in Sport and Sport Plus\u003c\/li\u003e\n  \u003cli\u003eSingle 3.5 inch centre pipe helps tame the typical S55 rasp for a richer tone\u003c\/li\u003e\n  \u003cli\u003eOval centre section improves ground clearance for lowered and track‑focused setups\u003c\/li\u003e\n  \u003cli\u003eIncludes four carbon fibre tailpipes for a premium finish\u003c\/li\u003e\n  \u003cli\u003eDurable stainless steel construction\u003c\/li\u003e\n  \u003cli\u003eTitanium option available for those chasing ultimate weight saving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDesign that works\u003c\/h3\u003e\n\u003cp\u003eThis system starts as dual 3 inch pipes from the front, transitions into a single ovalised 3.5 inch centre section for maximum underbody clearance, then splits to feed a large rear silencer with two OE‑style valves. That architecture increases flow, sharpens throttle response and delivers a bass‑rich note without the harshness many S55 owners want to avoid. Cruise quietly day to day, then unleash a more aggressive sound when you select the sportier driving modes.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGarage Whifbitz stainless centre and rear sections with valve control\u003c\/li\u003e\n  \u003cli\u003e4 x carbon fibre exhaust tips\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eOptions\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eTitanium version available for a super lightweight setup\u003c\/li\u003e\n  \u003cli\u003eFront pipes and mid sections available separately if retaining the factory backbox\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBMW M3 F80 Saloon\u003c\/li\u003e\n  \u003cli\u003eBMW M4 F82 Coupe\u003c\/li\u003e\n  \u003cli\u003eBMW M4 F83 Convertible\u003c\/li\u003e\n  \u003cli\u003eAll F8X models with the S55 engine\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy buy from MJ Modifications\u003c\/h3\u003e\n\u003cp\u003eWe run this hardware on customer builds and the feedback is consistently positive. Owners love the deeper tone, the quality of the welds and materials, and the seamless valve integration that keeps things refined when you want quiet and head‑turning when you want drama. If you are searching for a balanced upgrade that blends power, sound and everyday usability, this is a standout choice.\u003c\/p\u003e\n\n\u003ch3\u003eProfessional fitting\u003c\/h3\u003e\n\u003cp\u003eNeed installation We offer fitting at MJ Modifications in Warwickshire. For a tailored quote, email \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eSearch terms customers use\u003c\/h3\u003e\n\u003cp\u003eBMW M3 F80 exhaust upgrade UK, BMW M4 F82 coupe exhaust, BMW M4 F83 cabrio exhaust, F8X S55 single mid pipe 3.5 inch, valve controlled exhaust, valvetronic style back box, carbon fibre quad tips, stainless performance system, oval centre section ground clearance, rasp fix S55, dyno proven power, centre pipe and rear silencer, UK performance parts, M3 M4 sound upgrade, BMW F8X exhaust system UK, performance rear section, carbon tips quad exit, titanium exhaust option\u003c\/p\u003e","brand":"Performance M","offers":[{"title":"Default Title","offer_id":55975623852418,"sku":"gw_bmwm4s","price":1140.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/whifbitz_m4stainlessexhaust_1__77877.1646137522.jpg?v=1763322753","url":"https:\/\/mjmodifications.co.uk\/products\/garage-whifbitz-3-5-stainless-steel-exhaust-m3-m4-f8x","provider":"MJ Modifications","version":"1.0","type":"link"}