{"product_id":"n55-e-chassis-cen-cal-downpipe","title":"N55 E Chassis Downpipe","description":"\u003cp\u003eUnlock the full potential of your E-chassis N55 with the Catless Downpipe. Designed specifically for E-series BMW models running the N55 single twin-scroll turbo six, this catless downpipe eliminates the restrictive factory catalytic converter, opens up exhaust flow for serious top-end gains, and gives the N55 the unmuffled voice it should have come with. The foundational mod for any Stage 2 build on an E-chassis N55 car.\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* E-Chassis Specific Engineering: Built specifically for E-series N55 chassis layouts and exhaust routing. NOT cross-compatible with F-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.\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\u003eCRITICAL FITMENT NOTE: Many of these chassis were available with both N54 (twin-turbo) and N55 (single twin-scroll turbo) engines. Verify your engine code (N55B30) before ordering — N54 variants require a different downpipe.\u003c\/p\u003e","brand":"NuroTech™","offers":[{"title":"Default Title","offer_id":51318947119419,"sku":"N55E9XDP","price":349.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/8273\/4139\/files\/Untitled_1080x1080px_36.png?v=1780833222","url":"https:\/\/nuroperformance.com\/products\/n55-e-chassis-cen-cal-downpipe","provider":"Nuro Performance","version":"1.0","type":"link"}