{"product_id":"stone-exhaust-mini-b48-f60-countryman-cooper-s-cat-back-valvetronic-exhaust-system","title":"Stone Valvetronic Valved Cat-Back (Catback) Exhaust for MINI Cooper S F60 Countryman S \u0026 F54 Clubman S 2017+ B48\/B48E 2.0T | Remote Switchable Dual Valve | OBD2 Plug \u0026 Play | OPF\/GPF Safe, No-Drone Twin Exit Sports Exhaust | AP533BS\/AP533BGS","description":"\u003cdiv\u003e\n  \u003ch2\u003eSwitchable Sports Cat-Back for MINI Countryman S F60 and Clubman S F54 B48 and B48E\u003c\/h2\u003e\n\n  \u003cp\u003eTransform the soundtrack and response of your 2.0 turbo MINI with Stone Exhaust’s switchable, valve-controlled cat back. Purpose built for the B48 and B48E engines in the F60 Countryman S and F54 Clubman S from 2017 onward, this system blends exciting tone with refined cruising, giving you week‑day comfort and week‑end character at the press of a button. We have installed and used this system ourselves and our customers consistently praise the sound quality, the fit and the way the dual valves make the car feel alive without unwanted cabin boom.\u003c\/p\u003e\n\n  \u003cp\u003eLooking for a MINI S performance system, remote valve exhaust, twin exit upgrade, plug in OBD controller, GPF friendly sports exhaust, motorway friendly no drone solution or a premium catback for B48 and B48E engines? This is the one.\u003c\/p\u003e\n\n  \u003ch3\u003eKey reasons enthusiasts choose this system\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDual valve control with three modes using the supplied remote Open, Close and Auto for quiet neighbourhood starts or full soundtrack on demand\u003c\/li\u003e\n    \u003cli\u003eOBD II plug and play control module with RPM based logic for automatic valve operation without complex wiring\u003c\/li\u003e\n    \u003cli\u003eEngineered via 3D scanning and reverse engineering for factory level alignment and hassle free installation\u003c\/li\u003e\n    \u003cli\u003eRolling road developed with measurable improvements in flow and response plus that trademark Stone tone\u003c\/li\u003e\n    \u003cli\u003eCalm, drone free cruising on the motorway with valves shut and a deep, sporty note with valves open\u003c\/li\u003e\n    \u003cli\u003eGPF and OPF compatible solution available to prevent warning lights with no ECU coding required\u003c\/li\u003e\n    \u003cli\u003e7 axis CNC bending for exceptional roundness and smooth gas paths with sub 0.025 mm accuracy\u003c\/li\u003e\n    \u003cli\u003ePrecision welding with overlapping and direct spot techniques for long term durability\u003c\/li\u003e\n    \u003cli\u003eTwin outlet layout to suit the MINI S rear end aesthetics\u003c\/li\u003e\n    \u003cli\u003eBacked by a 2 year manufacturer warranty for peace of mind\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eHow the valve control works\u003c\/h3\u003e\n  \u003cp\u003eUse the remote to choose Open for maximum flow and a rich, aggressive tone, Close for a refined note during daily driving and motorways, or Auto to let RPM based logic handle the valves for you. The plug in OBD module keeps installation simple and reversible while providing smart control.\u003c\/p\u003e\n\n  \u003ch3\u003eOPF and GPF support\u003c\/h3\u003e\n  \u003cp\u003eRunning a petrol particulate filter car? A free of charge OPF fix solution is available so OPF equipped vehicles can run this system without throwing a fault. No coding is needed.\u003c\/p\u003e\n\n  \u003ch3\u003eApplications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eMINI F60 Countryman Cooper S 2017 onward\u003c\/li\u003e\n    \u003cli\u003eMINI F54 Clubman Cooper S 2017 onward\u003c\/li\u003e\n    \u003cli\u003eEngines B48 and B48E\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003ePart numbers\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eAP533BS for B48\u003c\/li\u003e\n    \u003cli\u003eAP533BGS for B48E\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eFitting and installation\u003c\/h3\u003e\n  \u003cp\u003eProfessional installation available at MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk\u003c\/p\u003e\n\n  \u003ch3\u003eVideo\u003c\/h3\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/uQvXUK9Q4aA\" title=\"MINI B48 and B48E switchable catback sound test by Stone Exhaust\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003ciframe width=\"1195\" height=\"672\" src=\"https:\/\/www.youtube.com\/embed\/V5c4VEyO1EM\" title=\"Stone Valvetronic system installation overview\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eGallery\u003c\/h3\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_MINI_B48_F60_Countryman_Cooper_S_Cat-Back_Valvetronic_Exhaust_System_Stone_Exhaust_USA1_2048x2048.png?v=1600765211\" alt=\"Stone switchable catback for MINI F60 Countryman S twin outlet by MJ Modifications UK\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_MINI_B48_F60_Countryman_Cooper_S_Cat-Back_Valvetronic_Exhaust_System_Stone_Exhaust_USA2_2048x2048.png?v=1600765265\" alt=\"MINI Clubman S F54 performance catback with valve control by Stone Exhaust\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_MINI_B48_F60_Countryman_Cooper_S_Cat-Back_Valvetronic_Exhaust_System_Stone_Exhaust_USA3_2048x2048.png?v=1600765283\" alt=\"Reverse engineered MINI S exhaust system 3D scanned for perfect fit\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_MINI_B48_F60_Countryman_Cooper_S_Cat-Back_Valvetronic_Exhaust_System_Stone_Exhaust_USA4_2048x2048.png?v=1600765298\" alt=\"Dual valve MINI Cooper S sports exhaust with remote control UK supplier\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eR and D and build quality\u003c\/h3\u003e\n  \u003cp\u003eStone digitises the original MINI system to map diameters, routing and bend geometry, then simulates flow, thermal zones and pressure to optimise performance and sound quality. The 7 axis CNC bending process keeps pipe roundness up to 98 percent and retains bore size even at tight 180 degree bends for minimal restriction. Precision mechanical welding with crisscross and overlapping techniques, plus direct spot welding, creates a strong, long lasting system designed to perform.\u003c\/p\u003e\n\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/1_9336c8b0-c9ea-4822-891c-83490f630707_2048x2048.jpg?v=1572705528\" alt=\"3D scanning and flow simulation for MINI B48 exhaust development\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/S__53968900_2048x2048.jpg?v=1591014788\" alt=\"Remote control for MINI switchable exhaust with Open Close Auto functions\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/bending_2048x2048.jpg?v=1572739395\" alt=\"7 axis CNC mandrel bends for smooth gas flow on MINI B48 catback\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_1_2048x2048.jpg?v=1572828150\" alt=\"Precision welding quality on Stone MINI performance exhaust\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_2_2048x2048.jpg?v=1572828178\" alt=\"Direct spot welding for durability on MINI B48 valved exhaust\" style=\"max-width:100%; height:auto;\"\u003e\n  \u003c\/div\u003e\n\n  \u003ch3\u003eWarranty\u003c\/h3\u003e\n  \u003cp\u003e2 year Stone Exhaust warranty.\u003c\/p\u003e\n\n  \u003ch3\u003eCommon search terms\u003c\/h3\u003e\n  \u003cp\u003eMINI S exhaust upgrade, MINI Countryman S F60 sports exhaust, MINI Clubman S F54 catback, B48 performance exhaust system, B48E valve exhaust, remote controlled exhaust MINI, switchable exhaust MINI, twin exit MINI S system, OPF safe exhaust, GPF friendly MINI exhaust, no drone MINI cat back, high flow MINI S exhaust, Stone Exhaust MINI UK, performance exhaust for MINI 2.0 turbo, OBD plug and play valve control, AP533BS, AP533BGS, MJ Modifications MINI fitting Warwickshire.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"B48 (Non-OPF) \/ Flat Cut Gloss Carbon Fibre (102mm)","offer_id":56006640730498,"sku":null,"price":2427.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/Flat_Cut_Gloss_Carbon_Fibre_102mm_1946x_0418f78e-2af8-4bbf-a95c-ef31d474b419.png?v=1764059494","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-mini-b48-f60-countryman-cooper-s-cat-back-valvetronic-exhaust-system","provider":"MJ Modifications","version":"1.0","type":"link"}