{"product_id":"stone-exhaust-bmw-n55-f20-f22-f30-f32-catless-downpipes-inc-335i-435i-m135i-m235i","title":"Stone Exhaust BMW N55 Catless Decat Downpipe (F20 F21 F22 F23 F30 F31 F32 F33 F36, F25 X3 35i, F26 X4 35i) - M135i M235i 335i 435i - PWG\/EWG","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eHigh-Flow De-Cat Turbo Outlet for BMW N55 F-Series – Track Use Only\u003c\/h2\u003e\n\n  \u003cp\u003eTransform the way your turbocharged straight-six responds with this Stone Exhaust de-cat turbo outlet for BMW N55 platforms. Expect faster boost build, sharper throttle, a harder-hitting mid-range and that addictive N55 soundtrack. This is the go-to performance front pipe for enthusiasts chasing a genuine step-up in response and sound on F-series 1 Series, 2 Series, 3 Series, 4 Series plus F25 X3 35i and F26 X4 35i.\u003c\/p\u003e\n\n  \u003cp\u003eIf you are searching for N55 performance front pipe, N55 de-cat turbo pipe, BMW M135i race pipe, M235i turbo outlet, F30 335i performance exhaust front section, F32 435i upgrade pipe, F25 X3 35i de-cat or F26 X4 35i high-flow turbo outlet, this premium one-piece unit is the smart choice.\u003c\/p\u003e\n\n  \u003ch3\u003eWhat makes it outstanding\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eOne-piece, high-flow design engineered to reduce backpressure and maintain gas speed for quicker spool and stronger torque\u003c\/li\u003e\n    \u003cli\u003e7 axis CNC mandrel bending preserves roundness through tight radii for excellent flow stability\u003c\/li\u003e\n    \u003cli\u003eUnique flex section absorbs heat cycling and vibration to protect the assembly from stress and cracking\u003c\/li\u003e\n    \u003cli\u003eTurbo flange features crisscross and overlapping welds for strength under extreme temperature load\u003c\/li\u003e\n    \u003cli\u003eRobotic welding for repeatable, clean penetration and consistent quality inside and out\u003c\/li\u003e\n    \u003cli\u003eDeveloped using 3D scanning with flow simulation to optimise diameter, routing and bend geometry\u003c\/li\u003e\n    \u003cli\u003eDirect bolt-on with OEM style fitment for F-series N55 applications\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eReal-world gains you can feel\u003c\/h3\u003e\n  \u003cp\u003eFree up the N55’s breathing and let the turbocharger work more efficiently. The result is a more urgent throttle, quicker boost response and a deeper, more aggressive exhaust tone that comes alive under load. Perfect foundation for Stage 2 calibration and performance tuning on M135i, M235i, 335i and 435i, as well as X3 35i and X4 35i.\u003c\/p\u003e\n\n  \u003ch3\u003eFitment coverage\u003c\/h3\u003e\n  \u003cp\u003eBMW 1 Series\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF20 M135i and M135i xDrive\u003c\/li\u003e\n    \u003cli\u003eF21 M135i and M135i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eBMW 2 Series\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF22 M235i and M235i xDrive\u003c\/li\u003e\n    \u003cli\u003eF23 M235i and M235i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eBMW 3 Series\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF30 and F31 335i and 335i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eBMW 4 Series\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF32 435i and 435i xDrive\u003c\/li\u003e\n    \u003cli\u003eF33 435i and 435i xDrive\u003c\/li\u003e\n    \u003cli\u003eF36 435i and 435i xDrive\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eBMW X Series\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF25 X3 xDrive35i\u003c\/li\u003e\n    \u003cli\u003eF26 X4 xDrive35i and X4 M40i xDrive (N55)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003ePWG and EWG variants with part numbers\u003c\/h3\u003e\n  \u003cp\u003eChoose the version that matches your wastegate type:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003ePWG Pneumatic Wastegate – Part number A201P\u003c\/li\u003e\n    \u003cli\u003eEWG Electronic Wastegate – Part number A202P\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eUnsure which you have? A vacuum line to the actuator indicates PWG. An electrical plug indicates EWG. Ask our team if you need assistance.\u003c\/p\u003e\n\n  \u003ch3\u003eEngineering detail\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eReverse engineered from OEM hardware using 3D scanning to identify restrictions and improve the gas path\u003c\/li\u003e\n    \u003cli\u003ePrecision bending retains up to 98% roundness through curves to keep velocity high\u003c\/li\u003e\n    \u003cli\u003eInternal surfaces kept smooth by robotic welds to avoid intrusive weld bead and turbulence\u003c\/li\u003e\n    \u003cli\u003eTight manufacturing tolerances target accurate fit and consistent performance\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation and mapping\u003c\/h3\u003e\n  \u003cp\u003eProfessional fitting is recommended. For a seamless install and optional calibration support, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk. An ECU calibration is recommended after installing a de-cat turbo outlet to optimise performance and manage potential warning lights.\u003c\/p\u003e\n\n  \u003ch3\u003eTried and approved by enthusiasts\u003c\/h3\u003e\n  \u003cp\u003eWe have fitted multiple Stone Exhaust N55 units at MJ Modifications and customer feedback has been consistently positive. Owners love the OEM-like fit, the quality of the welds, the refined yet purposeful tone at idle and the lively response once mapped.\u003c\/p\u003e\n\n  \u003ch3\u003eWarranty and manufacturer\u003c\/h3\u003e\n  \u003cp\u003eManufacturer: Stone Exhaust\u003c\/p\u003e\n  \u003cp\u003eWarranty: 2 Year Manufacturer Warranty\u003c\/p\u003e\n\n  \u003ch3\u003eImportant notice\u003c\/h3\u003e\n  \u003cp\u003eThis de-cat front pipe is intended for off-road and motorsport use where permitted. Please check local regulations before purchase and installation.\u003c\/p\u003e\n\n  \u003ch3\u003eMedia\u003c\/h3\u003e\n  \u003cp\u003eStock vs Stone Exhaust de-cat turbo outlet\u003c\/p\u003e\n  \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_BMW_N55_F20_F22_F30_F32_Catless_Downpipes_Inc._335i_435i_M135i_M235i_Stone_USA_-1_600x600.png?v=1591329399\" alt=\"Stone Exhaust N55 de-cat turbo outlet comparison - MJ Modifications UK\"\u003e\u003c\/p\u003e\n  \u003cp\u003eInstalled photos\u003c\/p\u003e\n  \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_BMW_N55_F20_F22_F30_F32_Catless_Downpipes_Inc._335i_435i_M135i_M235i_Stone_USA_-2_600x600.png?v=1591329384\" alt=\"BMW N55 performance front pipe installed - MJ Modifications UK\"\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_BMW_N55_F20_F22_F30_F32_Catless_Downpipes_Inc._335i_435i_M135i_M235i_Stone_USA_-3_600x600.png?v=1591329392\" alt=\"F30 F32 N55 de-cat turbo outlet fitment - MJ Modifications UK\"\u003e\u003c\/p\u003e\n  \u003cp\u003eBMW N55 F30 335i Stone Exhaust sound\u003c\/p\u003e\n  \u003cp\u003e\u003ciframe width=\"854\" height=\"480\" src=\"https:\/\/www.youtube.com\/embed\/WwSvyk-Ml7Y\" title=\"BMW N55 F30 335i Stone Exhaust sound\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\n  \u003ch3\u003ePopular search phrases\u003c\/h3\u003e\n  \u003cp\u003eBMW N55 performance front pipe UK, N55 turbo outlet upgrade, BMW M135i de-cat pipe, M235i performance exhaust front section, F30 335i turbo down pipe replacement, F32 435i race pipe, BMW 1 Series F20 F21 turbo elbow, BMW 2 Series F22 F23 de-cat exhaust, BMW 3 Series F30 F31 N55 tuning hardware, BMW 4 Series F32 F33 F36 turbo outlet pipe, X3 35i F25 N55 exhaust upgrade, X4 35i F26 N55 de-cat, N55 PWG pipe A201P, N55 EWG pipe A202P, Stage 2 N55 hardware, high flow N55 turbo pipe, BMW F-series N55 exhaust mod, M135i performance exhaust component, 335i turbo back upgrade, 435i cat delete front pipe.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Pneumatic","offer_id":56005766381954,"sku":null,"price":772.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/20171103150614921_1946x_5e392970-1fc4-4981-99b4-31878fb5acd5.png?v=1764022222","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-n55-f20-f22-f30-f32-catless-downpipes-inc-335i-435i-m135i-m235i","provider":"MJ Modifications","version":"1.0","type":"link"}