{"product_id":"vrsf-catted-downpipe-f22-f23-f87-f30-f32-f33-f36-n55","title":"VRSF Catted Downpipe F22 · F23 · F87 · F30 · F32 · F33 · F36 N55","description":"\u003cp\u003eThe VRSF catted downpipe replaces the factory catalytic converter on your N55-powered BMW with a high-flow 200-cell race cat, cutting the back pressure that holds back turbo spool and power. It bolts on to 335i, 435i, M235i, and M2 models running the N55 inline-six.\u003c\/p\u003e\n\u003cp\u003eHand-crafted from mandrel-bent 304 stainless steel with CNC-machined billet 304 stainless flanges, the downpipe keeps a working catalytic converter in place, so it retains a factory-style exhaust profile while opening up flow.\u003c\/p\u003e\n\u003ch3\u003eImportant Compatibility Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThis downpipe ships in two diameters, split by production date. M135i and 335i models built up to 07\/13 use the 3.5\" version; M135i and 335i models built after 08\/13, along with all M235i, 435i, and M2 models, use the 4\" version.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/pages\/contact-us\"\u003eContact your BMP Tuning rep\u003c\/a\u003e with your VIN if you're not sure which production run your car falls into before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHand-welded, mandrel-bent 304 stainless steel construction\u003c\/li\u003e\n\u003cli\u003eCNC-machined billet 304 stainless steel flanges\u003c\/li\u003e\n\u003cli\u003e200-cell high-flow catalytic converter reduces back pressure versus the factory cat\u003c\/li\u003e\n\u003cli\u003eSmooth radius bends reduce turbulence and improve flow\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVRSF catted downpipe\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVendor:\u003c\/strong\u003e VRSF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.5\" version (M135i · 335i, up to 07\/13 production):\u003c\/strong\u003e SKU V02D 10302021, MPN 10302021\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4\" version (M235i · 335i · 435i · M2, after 08\/13 production):\u003c\/strong\u003e SKU V02D 10302011, MPN 10302011\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e N55-powered F22\/F23 M235i, F30\/F31 335i, F32\/F33\/F34 435i, and F87 M2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this downpipe include a catalytic converter?\u003c\/strong\u003e\u003cbr\u003eYes, it uses a 200-cell high-flow race cat rather than deleting the catalytic converter entirely.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know which diameter my car needs?\u003c\/strong\u003e\u003cbr\u003eM135i and 335i models built before July 2013 use the 3.5\" version; everything built after that, plus all M235i, 435i, and M2 models, use the 4\" version. Check your build date or reach out with your VIN if you're unsure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a tune to see gains?\u003c\/strong\u003e\u003cbr\u003eA supporting tune is recommended to unlock the downpipe's full potential; per VRSF, tuned gains run in the 20 to 25 horsepower range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit right-hand-drive vehicles?\u003c\/strong\u003e\u003cbr\u003eVRSF does not publish a right-hand-drive fitment note for this specific downpipe, unlike its B58 downpipes. Confirm with your BMP Tuning rep before ordering an RHD vehicle.\u003c\/p\u003e","brand":"VRSF","offers":[{"title":"M135i · 335i - 3.5\" (Up to 07\/13 Production)","offer_id":51370077389047,"sku":"V02D 10302021","price":479.99,"currency_code":"USD","in_stock":true},{"title":"M235i · 335i · 435i · M2 - 4\" (After 08\/13 Production)","offer_id":51370077421815,"sku":"V02D 10302011","price":479.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0024\/4898\/2060\/files\/VRSFCattedDownpipeF22_F23_F87_F30_F32_F33_F36N55.png?v=1792503177","url":"https:\/\/blackforestindustries.com\/products\/vrsf-catted-downpipe-f22-f23-f87-f30-f32-f33-f36-n55","provider":"Black Forest Industries","version":"1.0","type":"link"}