{"product_id":"copy-of-stone-exhaust-bmw-n63-g30-m550i-xdrive-cat-back-valvetronic-exhaust","title":"Stone Exhaust AP528 BMW G30 M550i xDrive (N63R) OEM-Integrated Valved Cat-Back Exhaust System","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003carticle\u003e\n    \u003ch2\u003eStone AP528 for BMW G30 M550i xDrive N63R - Valve Controlled Cat Back Exhaust\u003c\/h2\u003e\n\n    \u003cp\u003eUnlock a deeper V8 soundtrack and sharper response on your G30 5 Series M550i xDrive with the Stone AP528 valve controlled cat back. This system retains factory electronic flap functionality for quiet cruising and an aggressive tone on throttle, giving you the best of both worlds for daily use and spirited driving.\u003c\/p\u003e\n\n    \u003cp\u003eWe have installed Stone systems on customer cars and our own projects. Fit is spot on, the tone is addictive and the build quality is superb. Feedback from M550i owners has been consistently positive for sound character, drivability and seamless integration with the car’s electronics.\u003c\/p\u003e\n\n    \u003ch3\u003eTop reasons to choose AP528\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003eFactory valve compatibility - uses your BMW’s original valve control for effortless switch between comfort and sport.\u003c\/li\u003e\n      \u003cli\u003eOptional Stone Valvetronic upgrade - add remote control for manual open and close whenever you want.\u003c\/li\u003e\n      \u003cli\u003eCAD and 3D scan developed - designed from the OEM layout for precise alignment and a true bolt on install.\u003c\/li\u003e\n      \u003cli\u003eDyno validated by Stone - engineered for improved flow and a refined, motorsport inspired note.\u003c\/li\u003e\n      \u003cli\u003eStrong, durable construction - precision welding, carefully controlled bends and robust joints built to handle heat and mileage.\u003c\/li\u003e\n      \u003cli\u003eEngineered for the N63R platform - tailored specifically to the G30 M550i xDrive 4.4 twin turbo V8.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eEngineering highlights\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003eOne piece sections with precision mechanical welding for strength and long term reliability.\u003c\/li\u003e\n      \u003cli\u003e7 axis CNC bending for exceptional roundness and consistent internal diameter to reduce turbulence.\u003c\/li\u003e\n      \u003cli\u003eCrisscross and overlapping weld techniques where temperatures peak for added endurance.\u003c\/li\u003e\n      \u003cli\u003eDirect spot welding by mechanical arms for accuracy and a clean finish.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003cdiv style=\"text-align: left;\"\u003e\n      \u003cimg alt=\"Stone Exhaust 3D scanning of BMW G30 M550i xDrive N63R cat back\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/1_9336c8b0-c9ea-4822-891c-83490f630707.jpg?v=1572705528\" style=\"float: none;\"\u003e\n    \u003c\/div\u003e\n\n    \u003ch3\u003eOPF and GPF equipped cars\u003c\/h3\u003e\n    \u003cp\u003eUsing a particulate filter. Stone supplies an OPF delete solution on request at no extra charge so you can fit this cat back to OPF vehicles without warnings, removing the need to code out the filter.\u003c\/p\u003e\n\n    \u003ch3\u003eValve control options\u003c\/h3\u003e\n    \u003cp\u003eKeep the factory flap control operated by your ECU or upgrade to the Stone Valvetronic package with dual valves and a handheld remote for manual control at any time.\u003c\/p\u003e\n\n    \u003cdiv style=\"text-align: left;\"\u003e\n      \u003cimg alt=\"Stone Exhaust precision CNC bending for BMW G30 M550i cat back\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/bending.jpg?v=1572739395\" style=\"float: none;\"\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"text-align: left;\"\u003e\n      \u003cimg alt=\"Stone Exhaust advanced welding for BMW M550i xDrive G30 system\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_2_1024x1024.jpg?v=1572828178\" style=\"float: none;\"\u003e\n    \u003c\/div\u003e\n\n    \u003ch3\u003eHear it on car\u003c\/h3\u003e\n    \u003cp\u003eDeep, refined and sporty with the valves closed and a hard edged V8 bark when open.\u003c\/p\u003e\n    \u003cp\u003e\n      \u003ciframe allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" frameborder=\"0\" height=\"480\" src=\"https:\/\/www.youtube.com\/embed\/UCo3OWhInXk\" title=\"Stone AP528 on BMW G30 M550i xDrive N63R - sound check\" width=\"854\"\u003e\u003c\/iframe\u003e\n    \u003c\/p\u003e\n\n    \u003ch3\u003eVehicle fitment\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003eBMW 5 Series G30 M550i xDrive\u003c\/li\u003e\n      \u003cli\u003eEngine code N63R\u003c\/li\u003e\n      \u003cli\u003eModel years 2015 onwards\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eProduct info\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003eBrand: Stone Exhaust\u003c\/li\u003e\n      \u003cli\u003eType: Valve controlled cat back with factory valve integration\u003c\/li\u003e\n      \u003cli\u003ePart number: AP528\u003c\/li\u003e\n      \u003cli\u003eWarranty: 2 year Stone Exhaust warranty\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eInstallation and support\u003c\/h3\u003e\n    \u003cp\u003eFor professional fitting, choose MJ Modifications in Warwickshire. We know these systems inside out and our customers love the results. Request a fitting quote at info@mjmodifications.co.uk.\u003c\/p\u003e\n\n    \u003ch3\u003eAlso searched as\u003c\/h3\u003e\n    \u003cp\u003eBMW G30 550i sports exhaust UK, BMW 5 Series M550i xDrive V8 cat back, BMW N63R valve controlled exhaust, BMW 5er 4.4 V8 exhaust upgrade, active flap exhaust for BMW 550i, BMW M550i sound upgrade UK, G30 5 Series performance rear section, BMW 550i xDrive sport system, Stone AP528 BMW 550i, plug and play valve exhaust BMW, GPF friendly BMW M550i exhaust, BMW 5 Series M550i rear exhaust system, BMW M550i flap control exhaust UK, G30 M550i sport exhaust replacement, BMW 550i back box and centre section upgrade.\u003c\/p\u003e\n\n    \u003ch3\u003eManufactured by\u003c\/h3\u003e\n    \u003cp\u003eStone Exhaust\u003c\/p\u003e\n\n    \u003ch3\u003ePart number\u003c\/h3\u003e\n    \u003cp\u003eAP528\u003c\/p\u003e\n  \u003c\/article\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Flat Cut Gloss Carbon Fiber (102mm)","offer_id":55975097991554,"sku":null,"price":3841.92,"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_e0a590ea-4ad0-48e5-8b73-4d3d9ebd97c2.png?v=1763320226","url":"https:\/\/mjmodifications.co.uk\/products\/copy-of-stone-exhaust-bmw-n63-g30-m550i-xdrive-cat-back-valvetronic-exhaust","provider":"MJ Modifications","version":"1.0","type":"link"}