{"product_id":"n55-f-series-cencal-downpipe","title":"N55 Catless Downpipe BMW M135 M235 M2 335 435","description":"\u003cdiv class=\"relative w-full overflow-visible\"\u003e\n\u003csection data-turn=\"assistant\" data-scroll-anchor=\"false\" data-testid=\"conversation-turn-152\" data-turn-id-container=\"request-69fcbaf1-9ee0-8324-9096-7ff85efe3ad6-13\" data-turn-id=\"request-69fcbaf1-9ee0-8324-9096-7ff85efe3ad6-13\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-turn-start-message=\"true\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-3-mini\" dir=\"auto\" data-message-id=\"701046a7-796b-440e-8596-1470b56c7d85\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp\u003eUnlock the full potential of your F-chassis N55 with the Catless Downpipe. Designed specifically for F-series BMW models running the N55 single twin-scroll turbo six, this catless downpipe eliminates the restrictive factory catalytic converter and opens up real top-end power, faster spool, and the kind of N55 soundtrack the OEM exhaust completely buries. The foundational mod for any Stage 2 F-chassis N55 build — M135i, M235i, F87 M2, 335i, 435i, 535i, 640i, and X-Series 35i.\u003c\/p\u003e\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cp\u003e* Catless High-Flow Design: Removes the restrictive OEM catalytic converter. Faster turbo spool, reduced backpressure, and noticeable top-end gains. Typical Stage 2 builds see 25-40 WHP and 30-40 WTQ improvements when paired with a proper tune.\u003c\/p\u003e\n\u003cp\u003e* N55 Sound Transformation: Unmuffles the N55 turbo six. Deeper exhaust note, pronounced overrun pops, audible blow-off chatter, and the kind of single-turbo character the OEM exhaust hides completely.\u003c\/p\u003e\n\u003cp\u003e* F-Chassis Specific Engineering: Built specifically for F-series N55 chassis layouts and exhaust routing. NOT cross-compatible with E-chassis N55 cars — exhaust geometry, flange placement, and length are different.\u003c\/p\u003e\n\u003cp\u003e* 3\" T304 Stainless Construction: Mandrel-bent piping with CNC-machined OEM flanges, hand TIG-welded throughout. Corrosion-proof, heat-tolerant, built to handle high-boost builds and sustained track use.\u003c\/p\u003e\n\u003cp\u003e* Direct OEM Flange Fitment: Bolts straight to the OEM turbo outlet and stock mid-pipe section. No cutting, no welding, no custom fabrication required. Compatible with both RWD and xDrive variants of supported chassis.\u003c\/p\u003e\n\u003cp\u003e* Stage 2 Build Foundation: Required for serious tune levels. Pairs perfectly with MHD, JB4, Bootmod3, FMIC upgrades, methanol injection, and bigger turbo conversions.\u003c\/p\u003e\n\u003cp\u003eIMPORTANT COMPLIANCE NOTE: Catless downpipes are designed for OFF-ROAD \/ TRACK USE ONLY. Removes the catalytic converter required for road registration in Australia and most international markets. NOT legal for road-registered vehicles. Will trigger check engine lights and emissions codes without proper tuning.\u003c\/p\u003e\n\u003cp\u003eTUNE REQUIRED: To unlock full power potential and clear fault codes, a custom or off-the-shelf tune (MHD, JB4, Bootmod3, etc.) is required after fitment.\u003c\/p\u003e\n\u003cp\u003eFITMENT NOTE: F-Chassis F87 M2 (2016-2018) refers to the pre-Competition N55-powered M2 only. F87 M2 Competition \/ M2 CS (2018+) uses the S55 engine and requires a different downpipe.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"NuroTech™","offers":[{"title":"Default Title","offer_id":51318947217723,"sku":null,"price":399.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/8273\/4139\/files\/Untitled_1080x1080px_38.png?v=1780833289","url":"https:\/\/nuroperformance.com\/products\/n55-f-series-cencal-downpipe","provider":"Nuro Performance","version":"1.0","type":"link"}