{"product_id":"stone-exhaust-bmw-n55-f20-f22-eddy-catalytic-downpipe-m135i-m235i","title":"Stone Exhaust Eddy Catalytic Catted Downpipe for BMW N55 - F20 F21 F22 F23 F30 F31 F32 F33 F36 F25 F26 (M135i, M235i, 335i, 435i, X3 35i xDrive, X4 35i\/40i xDrive) High Flow, Euro 6 MOT Friendly, PWG\/EWG","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003e\u003cstrong\u003eStone Exhaust Eddy Catalytic Sports Cat Front Pipe for BMW N55\u003c\/strong\u003e\u003c\/h2\u003e\n  \u003ch3\u003eF20 F21 M135i, F22 F23 M235i, F30 F31 335i, F32 F33 F36 435i, F25 X3 35i xDrive, F26 X4 35i and M40i xDrive\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Unlock smoother spool, stronger midrange and a cleaner exhaust note with the Stone Exhaust Eddy Catalytic sport cat front pipe for the BMW N55 single turbo engine. This high flow catalytic converter upgrade is engineered for emissions-conscious performance, delivering rapid throttle response and impressive top end without nuisance warning lights. It is a direct bolt-on using premium SUS304 stainless steel, precision bends and OEM-style fitment points for hassle-free installation.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    We have fitted this system in-house and the feedback from our customers has been outstanding. Fit is spot on, response is instant and the tone is refined with a purposeful growl under load. If you want a road-friendly catalyst upgrade that still lets your N55 breathe, this is the sweet spot.\n  \u003c\/p\u003e\n\n  \u003ch4\u003e\u003cstrong\u003eKey reasons to choose this N55 catalyst upgrade\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eHigh flow sport catalytic converter designed for power and compliance\u003c\/li\u003e\n    \u003cli\u003ePatented Eddy Catalytic geometry promotes vortex mixing at low rpm for torque, then opens up for big flow at higher engine speeds\u003c\/li\u003e\n    \u003cli\u003eOptimised lambda probe placement for error-free running and no check engine lights\u003c\/li\u003e\n    \u003cli\u003eImmediate turbo spool and sharper throttle response\u003c\/li\u003e\n    \u003cli\u003e3D scanned and CAD optimised for 100 percent factory-like fitment\u003c\/li\u003e\n    \u003cli\u003eSUS304 stainless steel throughout for corrosion resistance and strength\u003c\/li\u003e\n    \u003cli\u003eDual cross-welding at the turbine flange for durability in extreme heat\u003c\/li\u003e\n    \u003cli\u003eEuro 6 compliant and UK MOT friendly\u003c\/li\u003e\n    \u003cli\u003e76.2 mm diameter tubing for excellent gas flow\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003e\u003cstrong\u003eEngineering highlights\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cp\u003e\n    Each application is reverse engineered from the original parts using 3D scanning to lock in routing, diameter and bend geometry. Computational analysis refines gas velocity, heat zones and pressure distribution. Stone Exhaust manufacture on a 7-axis CNC bending platform to maintain roundness and precision, which reduces turbulence and avoids weld stress. Crisscross and overlapping weld techniques, plus direct spot welding, increase joint strength in areas that regularly see 800 to 1100 C.\n  \u003c\/p\u003e\n\n  \u003ch4\u003e\u003cstrong\u003eProven gains\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003ePower increase: +24.4 PS at 5734 rpm\u003c\/li\u003e\n    \u003cli\u003eTorque increase: +16.6 ft lb at 2921 rpm\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003e\u003cstrong\u003eVehicle compatibility\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cp\u003e\u003cstrong\u003eBMW 1 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF20 M135i and M135i xDrive 2011 to 2015\u003c\/li\u003e\n    \u003cli\u003eF20 LCI M135i and M135i xDrive 2015 to 2018\u003c\/li\u003e\n    \u003cli\u003eF21 M135i 2011 onward and M135i xDrive 2012 to 2015\u003c\/li\u003e\n    \u003cli\u003eF21 LCI M135i and M135i xDrive 2014 to 2016\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\u003cstrong\u003eBMW 2 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF22 M235i 2012 to 2016\u003c\/li\u003e\n    \u003cli\u003eF22 M235i xDrive 2013 to 2016\u003c\/li\u003e\n    \u003cli\u003eF23 M235i and M235i xDrive 2014 to 2016\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\u003cstrong\u003eBMW 3 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF30 F31 335i and 335i xDrive 2011 to 2015\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\u003cstrong\u003eBMW 4 Series\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF32 F33 F36 435i and 435i xDrive 2012 to 2016\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\u003cstrong\u003eBMW X Models\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF25 X3 35i xDrive 2009 to 2017\u003c\/li\u003e\n    \u003cli\u003eF26 X4 35i xDrive 2013 to 2018 and M40i xDrive 2014 to 2018\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch4\u003e\u003cstrong\u003ePart numbers\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eA201E - PWG\u003c\/li\u003e\n    \u003cli\u003eA202E - EWG\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\n    Please select the correct option for your wastegate type. If you are unsure whether your car is PWG or EWG, we will confirm before dispatch.\n  \u003c\/p\u003e\n\n  \u003ch4\u003e\u003cstrong\u003eFree compatibility check\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cp\u003e\n    For peace of mind, provide your UK registration or the last 7 digits of your VIN at checkout and we will verify fitment prior to shipping.\n  \u003c\/p\u003e\n\n  \u003ch4\u003e\u003cstrong\u003eProfessional fitting\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cp\u003e\n    Installation and setup available at MJ Modifications in Warwickshire. Request a fitting quote or book by emailing \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003ch4\u003e\u003cstrong\u003eManufacturer and warranty\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cp\u003e\n    Manufactured by Stone Exhaust with a 2 year Stone Exhaust warranty.\n  \u003c\/p\u003e\n\n  \u003ch4\u003e\u003cstrong\u003eIdeal upgrade path\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cp\u003e\n    Pair with the Stone Exhaust M135i and M235i valved cat-back system for a complete N55 exhaust transformation.\n  \u003c\/p\u003e\n\n  \u003ch4\u003e\u003cstrong\u003eAlso searched as\u003c\/strong\u003e\u003c\/h4\u003e\n  \u003cp\u003e\n    BMW N55 sport cat, BMW M135i catalytic converter upgrade, M235i high flow cat pipe, 335i turbo outlet front pipe, 435i catalyst pipe, X3 35i sport catalytic converter, X4 35i cat pipe, X4 M40i cat upgrade, N55 front pipe, N55 catalytic converter UK, CEL safe catalyst, O2 sensor friendly cat, Euro 6 compliant catalyst, MOT friendly sports cat, stainless steel 304 front pipe, performance exhaust front section, vortex catalyst technology, PWG EWG N55 cat, BMW F20 F21 F22 F23 F30 F31 F32 F33 F36 F25 F26 catalyst upgrade.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Pneumatic (Before July 2013)","offer_id":56005662343554,"sku":null,"price":1401.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/STONE_Exhaust_BMW_N55_F20_F21_F22_Eddy_Catalytic_Downpipe_M135i_M235i_1946x_99179f73-f152-465c-a2b5-c35093a23332.png?v=1764021282","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-n55-f20-f22-eddy-catalytic-downpipe-m135i-m235i","provider":"MJ Modifications","version":"1.0","type":"link"}