{"product_id":"stone-exhaust-bmw-n55-f87-m2-cat-back-valvetronic-exhaust","title":"Stone Exhaust BMW M2 F87 N55 Valved Cat-Back Performance Exhaust | Switchable Flap\/Valvetronic Sports System, Rear Section + Mid-Pipe Catback Muffler\/Back Box Upgrade | OEM Valve Control, OPF\/GPF Compatible | AP519","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eBMW M2 F87 N55 Switchable Sports Exhaust by Stone\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Transform the character of your F87 with Stone’s valve-controlled rear system and hear your turbocharged straight-six at its best. This premium rear section and mid pipe combination brings a richer soundtrack, improved response and superb build quality, while retaining factory-style valve control for everyday refinement. Ideal for road and track, it delivers a purposeful tone under load and calm cruising with minimal cabin resonance.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003ePart Number: AP519\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eHighlights\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eDirect-fit rear system for BMW M2 F87 with N55 engine using the original flap motors for seamless ECU-controlled operation\u003c\/li\u003e\n    \u003cli\u003eOptional remote valve control kit with simple OBD port plug-in for manual open or quiet modes at the touch of a button\u003c\/li\u003e\n    \u003cli\u003eRolling-road verified gains with the trademark Stone soundtrack and sharper throttle feel\u003c\/li\u003e\n    \u003cli\u003e3D-scanned development for precise routing and true OEM-style fit\u003c\/li\u003e\n    \u003cli\u003eDesigned to keep cruising civil with low interior resonance and excellent NVH control\u003c\/li\u003e\n    \u003cli\u003ePrecision fabrication with accurate spot welding plus overlapping techniques for durability under heat\u003c\/li\u003e\n    \u003cli\u003e7-axis CNC bending for smooth radii and consistent pipe roundness to maximise flow\u003c\/li\u003e\n    \u003cli\u003eBacked by a 2-year Stone Exhaust warranty\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eProven power on the dyno\u003c\/h3\u003e\n  \u003cp\u003e\n    Expect gains of up to \u003cstrong\u003e+16.9 PS at 5800 rpm\u003c\/strong\u003e and \u003cstrong\u003e+21.6 Nm at 3600 rpm\u003c\/strong\u003e. Enjoy stronger mid-range pull, crisper response and a deeper, more engaging tone that suits the M2’s character.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eFactory flap integration with optional remote control\u003c\/h3\u003e\n  \u003cp\u003e\n    Keep the best of both worlds. The system reuses the OE flap motors so the ECU manages the valves just like standard. Prefer full manual control. Add Stone’s dual-valve remote kit for instant open or closed modes via a neat OBD plug-and-play controller.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eOPF and GPF friendly solution\u003c\/h3\u003e\n  \u003cp\u003e\n    Running a particulate filter. Stone includes an OPF delete solution at no extra cost so you can install without error codes, removing the need for ECU coding on compatible vehicles.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eEngineering that makes the difference\u003c\/h3\u003e\n  \u003cp\u003e\n    Stone begins with a full 3D scan of the OE system to perfect pipe diameter, route and bend angles. Computational flow work is used to optimise gas speed, temperature control and pressure balance. The 7-axis CNC bending process ensures exceptional roundness, while carefully executed spot, crisscross and overlapping welds enhance strength and longevity at critical joints.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eVehicle compatibility\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eBMW M2 F87 N55 2014+\u003c\/li\u003e\n    \u003cli\u003eBMW M2 F87 LCI N55 2016+\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eInstallation\u003c\/h3\u003e\n  \u003cp\u003e\n    Designed as a straight swap on compatible models with no cutting required. 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.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat owners are saying\u003c\/h3\u003e\n  \u003cp\u003e\n    We have fitted this system on customer M2s and our own cars. Fitment is precise, valve control is slick and the tone is spot on: deeper, sportier and still refined on the motorway. Feedback has been consistently positive on quality, sound and drivability.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWatch and listen\u003c\/h3\u003e\n  \u003cdiv style=\"margin: 10px 0;\"\u003e\n    \u003ciframe width=\"100%\" height=\"480\" src=\"https:\/\/www.youtube.com\/embed\/xfL0xc6bD5E\" title=\"BMW M2 F87 N55 Stone Exhaust Sound and Dyno\" frameborder=\"0\" allow=\"accelerometer; autoplay; 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=\"100%\" height=\"480\" src=\"https:\/\/www.youtube.com\/embed\/OOKv8UvqOYc\" title=\"BMW F87 M2 Stone Exhaust System Audio\" 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  \u003cp\u003e\u003cimg alt=\"BMW M2 F87 N55 Stone Sports Exhaust Dyno Results\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Untitled5_1ce75aef-c249-4b50-9058-0d6bb9a2cca2_600x600.png?v=1589169492\"\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cimg alt=\"BMW M2 F87 N55 Stone Sports Exhaust Installed View 1\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Untitled_faaf13d8-a866-4ca4-b70a-a811428da33d_600x600.png?v=1589169221\"\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cimg alt=\"BMW M2 F87 N55 Stone Sports Exhaust Installed View 2\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Untitled1_3169858d-97ef-474c-9199-d02e9feccd34_600x600.png?v=1589169232\"\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cimg alt=\"BMW M2 F87 N55 Stone Sports Exhaust Installed View 3\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Untitled2_3f908a79-6ca0-4878-8ecc-fe36dc2cd467_600x600.png?v=1589169238\"\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cimg alt=\"BMW M2 F87 N55 Stone Sports Exhaust Installed View 4\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Untitled3_7a5473fa-c24d-42c2-934d-08aa45cd170b_600x600.png?v=1589169247\"\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cimg alt=\"BMW M2 F87 N55 Stone Sports Exhaust Components\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Untitled4_3e6ae728-a607-43bc-af97-2baf7def4f0e_600x600.png?v=1589169255\"\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eR and D\u003c\/h3\u003e\n  \u003cp\u003e\u003cimg alt=\"Stone Exhaust 3D Scanning and Reverse Engineering\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/1_9336c8b0-c9ea-4822-891c-83490f630707.jpg?v=1572705528\"\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cimg alt=\"Stone Exhaust Precision Bending\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/bending.jpg?v=1572739395\"\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cimg alt=\"Stone Exhaust Welding Detail 1\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_1_1024x1024.jpg?v=1572828150\"\u003e\u003c\/p\u003e\n  \u003cp\u003e\u003cimg alt=\"Stone Exhaust Welding Detail 2\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/Stone_Exhaust_Art_of_Welding_-_2_1024x1024.jpg?v=1572828178\"\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eWarranty\u003c\/h3\u003e\n  \u003cp\u003e\n    Stone Exhaust 2-year warranty for peace of mind.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eManufactured by\u003c\/h3\u003e\n  \u003cp\u003e\n    Stone Exhaust\n  \u003c\/p\u003e\n\n  \u003ch3\u003ePart number\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eAP519\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eSearch-friendly phrases\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW M2 F87 N55 sports exhaust, M2 switchable flap system, F87 performance rear section, N55 turbo back box upgrade, BMW M2 valve control exhaust, ECU flap compatible exhaust, BMW M2 sound upgrade, M2 F87 stainless performance system, BMW M2 track day exhaust, M2 exhaust with remote control, BMW M2 GPF OPF solution, plug-in OBD valve controller for M2, best M2 N55 exhaust UK, BMW M2 rear system upgrade, Stone M2 exhaust UK supplier, M2 F87 exhaust Warwickshire fitting, BMW M2 performance parts UK.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Flat Cut Gloss Carbon Fiber (102mm)","offer_id":55977895657858,"sku":null,"price":3213.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/1020CG_FlatCutGlossCarbonFibre_102mm_1024x1024_2x_183dcb77-d3cc-4977-a250-023051434716.png?v=1763377200","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-n55-f87-m2-cat-back-valvetronic-exhaust","provider":"MJ Modifications","version":"1.0","type":"link"}