{"product_id":"stone-exhaust-bmw-n20-f22-f23-228i-cat-back-valvetronic-exhaust","title":"Stone Exhaust Valvetronic Cat-Back for BMW 2 Series 228i N26 (F22\/F23) – Valved Performance Exhaust System, Coupe\/Convertible \u0026 xDrive – AP508NSN26","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eStone Exhaust BMW N26 F22 F23 228i Cat-Back Valvetronic Exhaust\u003c\/h2\u003e\n  \u003cp\u003eUpgrade your BMW 2 Series with the Stone Exhaust Valvetronic Cat-Back Exhaust System and unleash a deeper, cleaner sound with real performance gains. Designed specifically for the BMW F22 228i Coupe and F23 228i Convertible with the N26 engine, this cat-back exhaust delivers OEM-level fitment, droneless cruising and a switchable valved soundtrack for daily driving and spirited runs.\u003c\/p\u003e\n  \u003cp\u003ePart Number: \u003cstrong\u003eAP508NSN26\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eWhy choose this BMW 228i exhaust\u003c\/h3\u003e\n  \u003cp\u003eStone Exhaust engineers 3D-scan the OEM BMW system, then reverse engineer every bend and flange to guarantee a precise, 100% OEM fit. Developed and validated on an in-house dyno, this BMW 228i performance exhaust is tuned for smooth flow, crisp throttle response and the signature Stone tone without the cabin drone that plagues many systems.\u003c\/p\u003e\n  \u003cp\u003eWe have installed and used this system ourselves here at Nforcd and our customers love the fit, the quality and the switchable sound. It is an ideal upgrade for anyone searching for BMW 228i exhaust, BMW F22 exhaust, BMW F23 exhaust, BMW N26 cat back, BMW 2 Series valved exhaust, BMW 228i performance exhaust UK.\u003c\/p\u003e\n\n  \u003ch3\u003eValvetronic control, your sound on demand\u003c\/h3\u003e\n  \u003cp\u003eThe Valvetronic remote gives you instant control of the valves with three modes: ON, OFF and AUTO. Open for an aggressive tone, close for refined comfort, or use AUTO to open and close at your chosen RPM. The plug and play OBDII controller makes installation simple and clean, with no complicated wiring. Perfect for daily driving, commuting and weekend blasts.\u003c\/p\u003e\n\n  \u003ch3\u003eKey features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eBMW 228i cat-back exhaust for N26 engine - F22 Coupe and F23 Convertible\u003c\/li\u003e\n    \u003cli\u003eValvetronic valved exhaust - switchable ON, OFF, AUTO via remote\u003c\/li\u003e\n    \u003cli\u003ePlug and play OBDII controller - quick install, clean integration\u003c\/li\u003e\n    \u003cli\u003eOne piece design for optimal flow and reliability\u003c\/li\u003e\n    \u003cli\u003eEliminates drone vs the standard exhaust system for comfortable cruising\u003c\/li\u003e\n    \u003cli\u003e3D scanning and reverse engineering for 100% OEM fitment\u003c\/li\u003e\n    \u003cli\u003eIn-house dyno developed for proven performance and sound\u003c\/li\u003e\n    \u003cli\u003ePrecision mechanical welding, direct spot welding and crisscross overlap techniques for long-term durability\u003c\/li\u003e\n    \u003cli\u003e7 axis CNC bending for exceptional roundness and flow accuracy\u003c\/li\u003e\n    \u003cli\u003eBuilt for enthusiasts who want a quality BMW 2 Series performance exhaust upgrade\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eEngineering that makes a difference\u003c\/h3\u003e\n  \u003cp\u003eFrom R\u0026amp;D to final welds, Stone Exhaust focuses on flow, heat management and structural integrity. The 7 axis CNC bending process achieves up to 98 percent roundness and precise radii, which helps prevent turbulence and maintains consistent gas velocity. Combined with direct spot welding and overlapping welds at high-stress joints, the result is a robust, leak-resistant system that sounds superb and performs reliably.\u003c\/p\u003e\n\n  \u003cdiv style=\"text-align: left; margin: 16px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/1_9336c8b0-c9ea-4822-891c-83490f630707.jpg?v=1572705528\" alt=\"Stone Exhaust 3D Scanning and Reverse Engineering for BMW 228i N26\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eRemote-controlled Valvetronic\u003c\/h3\u003e\n  \u003cp\u003eEnjoy quiet early morning starts or open the valves for a stronger tone when the road opens up. The AUTO mode can be set to your preferred RPM so the system adapts to your driving. This is the ultimate BMW 228i valved exhaust, BMW F22 catback, BMW F23 cat back, BMW 2 Series exhaust upgrade for drivers who want control.\u003c\/p\u003e\n\n  \u003cdiv style=\"text-align: left; margin: 16px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Untitled_e55d1881-dc86-4cb6-a91c-734c502c538f_600x600.png?v=1587977200\" alt=\"Stone Valvetronic BMW F22 F23 228i Cat-Back Exhaust System\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eInstallation and fitment\u003c\/h3\u003e\n  \u003cp\u003eThis BMW 228i cat-back exhaust is designed for a straightforward fit using factory mounting points. The OBDII controller is plug and play. For professional fitting, book with Nforcd in Warwickshire. Request a quote at \u003ca href=\"mailto:Sales@nforcd.com\"\u003eSales@nforcd.com\u003c\/a\u003e.\u003c\/p\u003e\n\n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cp\u003eBMW 2 Series N26 engine models:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eF22 228i 2012+ and 228i xDrive 2013+\u003c\/li\u003e\n    \u003cli\u003eF23 228i 2014+ and 228i xDrive 2014+\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat you will experience\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCleaner, richer exhaust note with valves open\u003c\/li\u003e\n    \u003cli\u003eRefined, comfortable volume with valves closed\u003c\/li\u003e\n    \u003cli\u003eCrisp throttle response and smooth flow from dyno-developed routing\u003c\/li\u003e\n    \u003cli\u003eDaily-drive friendly, weekend-ready performance\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eVideo\u003c\/h3\u003e\n  \u003cdiv style=\"position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; margin: 12px 0;\"\u003e\n    \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/V5c4VEyO1EM\" title=\"Stone Valvetronic System Installation\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%;\"\u003e\u003c\/iframe\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eWarranty\u003c\/h3\u003e\n  \u003cp\u003eStone Exhaust 2 year warranty.\u003c\/p\u003e\n\n  \u003ch3\u003ePart number\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eAP508NSN26\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003ePopular search terms\u003c\/h3\u003e\n  \u003cp\u003eBMW 228i exhaust, BMW 228i cat back, BMW 228i catback, BMW F22 exhaust, BMW F23 exhaust, BMW 2 Series exhaust, BMW N26 exhaust, BMW 228i valvetronic exhaust, BMW 228i valved exhaust, BMW 228i performance exhaust UK, BMW F22 228i cat-back, BMW F23 228i cat back, Stone Exhaust BMW 228i, plug and play OBDII exhaust controller, BMW 228i xDrive exhaust upgrade.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Flat Cut Gloss Carbon Fiber (82mm)","offer_id":42409612607676,"sku":null,"price":2427.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/9465\/6700\/products\/8200CG_FlatCutGlossCarbonFiber82mmExhuastTailpipes_1946x_8eef5030-900c-4eec-a8a7-cb8abc55bbf5.png?v=1680602690","url":"https:\/\/www.nforcd.com\/products\/stone-exhaust-bmw-n20-f22-f23-228i-cat-back-valvetronic-exhaust","provider":"Nforcd","version":"1.0","type":"link"}