{"product_id":"stone-exhaust-bmw-n20-f22-f23-228i-cat-back-valvetronic-exhaust","title":"Stone Valvetronic Valved Cat-Back Exhaust for BMW 2 Series 228i N26 2.0T (F22\/F23) Coupe\/Convertible \u0026 x","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eSwitchable Valve Catback for BMW 228i N26 F22 F23 and xDrive\u003c\/h2\u003e\n  \u003cp\u003eGive your turbocharged 2.0 BMW real character with a valve-controlled rear system that blends refined cruising with a proper motorsport bark on demand. This Stone Exhaust setup transforms the soundtrack and sharpens response while keeping everyday comfort intact. It is a direct bolt-on for F22 228i Coupe, F23 228i Convertible and xDrive variants with the N26 engine.\u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003ePart number: AP508NSN26\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eWhat makes it stand out\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eValve-controlled sound: quiet when you need it, aggressive when you want it\u003c\/li\u003e\n    \u003cli\u003eOBD plug-in controller with remote handset for Open, Closed and Auto modes\u003c\/li\u003e\n    \u003cli\u003eFactory-style mounting points for a true bolt-on installation\u003c\/li\u003e\n    \u003cli\u003e7 axis mandrel bending for superb roundness and gas velocity\u003c\/li\u003e\n    \u003cli\u003ePrecision jig build, direct spot welds and overlap joints for long-term durability\u003c\/li\u003e\n    \u003cli\u003eEngineered to keep cabin resonance low while delivering a deeper, cleaner tone\u003c\/li\u003e\n    \u003cli\u003eDyno-developed routing to promote smooth flow and crisp throttle response\u003c\/li\u003e\n    \u003cli\u003eSingle-piece main section to minimise leaks and maximise reliability\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eValve control made simple\u003c\/h3\u003e\n  \u003cp\u003eThe supplied controller plugs into the OBDII port for a clean, reversible install. Choose:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOpen\u003c\/strong\u003e for a stronger, more aggressive note\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClosed\u003c\/strong\u003e for refined, neighbour-friendly drive-bys\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAuto\u003c\/strong\u003e to trigger the valves at a user-defined RPM\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eThe result is a genuine dual-character system that suits commuting, long trips and weekend blasts.\u003c\/p\u003e\n\n  \u003ch3\u003eBuilt with OE-level accuracy\u003c\/h3\u003e\n  \u003cp\u003eStone scans the factory system and reverse engineers every bend and flange to ensure perfect alignment with hangers, brackets and clamps. The attention to flow, heat control and structural integrity means consistent performance and a soundtrack that feels premium rather than boomy.\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=\"3D scanned, reverse engineered fit for BMW 228i N26 F22 F23\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eFitment\u003c\/h3\u003e\n  \u003cp\u003eFor BMW 2 Series models with the N26 engine:\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\u003eReal-world feedback\u003c\/h3\u003e\n  \u003cp\u003eWe have installed and used this system at MJ Modifications and it delivers exactly what enthusiasts want: a quality build, a genuine OEM-plus fit and finish, and a switchable soundtrack that customers consistently praise for being punchy with the valves open and civil with them shut.\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=\"Valved remote controller for BMW 228i N26 catback\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eWhat you will notice\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eRicher, deeper tone with the valves open\u003c\/li\u003e\n    \u003cli\u003eHushed, comfortable volume with the valves closed\u003c\/li\u003e\n    \u003cli\u003eSmoother flow and sharper response from the turbo four\u003c\/li\u003e\n    \u003cli\u003eDaily-driver friendly refinement with weekend-ready excitement\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation\u003c\/h3\u003e\n  \u003cp\u003eDesigned to mount to factory points with the supplied hardware. For professional fitting, book with MJ Modifications in Warwickshire. Request a quote at \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\u003c\/p\u003e\n\n  \u003ch3\u003eWarranty\u003c\/h3\u003e\n  \u003cp\u003eStone Exhaust 2 year warranty.\u003c\/p\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\u003eSearch-friendly terms\u003c\/h3\u003e\n  \u003cp\u003eBMW 228i N26 catback, F22 228i sports system, F23 228i cabriolet valve exhaust, BMW 2 Series 2.0T sound upgrade, 228i xDrive muffler upgrade, switchable flap system for BMW 228i, remote valve cat back UK, BMW 228i back box upgrade, performance rear section for BMW F22 F23, turbo four N26 performance exhaust, Stone Valvetronic AP508NSN26, BMW 228i coupe exhaust UK, BMW 2 Series valved catback UK, plug and play OBD valve controller BMW 228i, BMW 228i sound control exhaust, BMW F22 F23 228i AWD performance system.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Flat Cut Gloss Carbon Fiber (82mm)","offer_id":55977891365250,"sku":null,"price":2427.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/8200CG_FlatCutGlossCarbonFiber82mmExhuastTailpipes_1946x_8eef5030-900c-4eec-a8a7-cb8abc55bbf5.png?v=1763377187","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-n20-f22-f23-228i-cat-back-valvetronic-exhaust","provider":"MJ Modifications","version":"1.0","type":"link"}