{"product_id":"stone-exhaust-bmw-s55-f87-m2-competition-cat-back-exhaust-system","title":"Stone Exhaust AP534 BMW M2 Competition (M2C) F87 S55 Valved Cat-Back\/Axle-Back Performance Exhaust - Quad Tips, OPF\/GPF Delete \u0026 Error Fix, OEM Valve Integration, Optional Valvetronic OBD Remote Back Box\/Muffler Upgrade, No Drone","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eStone Exhaust AP534 for BMW F87 M2 Competition S55, valve-controlled performance rear system with GPF solution and quad outlets\u003c\/h2\u003e\n\n  \u003cp\u003eGive your BMW M2 Competition the soundtrack it deserves with the Stone Exhaust AP534. This direct-fit rear system integrates with the factory valve control for everyday civility and a richer, more purposeful tone when you want it. Engineered from 3D scans of the OEM hardware, reverse engineered and dyno refined, it offers precise fitment, strong build quality and a noticeable uplift in character without the headache of drone on the motorway.\u003c\/p\u003e\n\n  \u003cp\u003eWe have installed and used this system ourselves and our customers love the transformation. The car gains a deeper idle, a crisper cold start and a cleaner, more aggressive note under load, while remaining calm in Comfort. It is exactly what an M2C should sound like.\u003c\/p\u003e\n\n  \u003ch3\u003eKey reasons to choose AP534 for your M2C\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eFactory valve logic retained, the ECU manages the exhaust flaps just like stock for effortless day to day usability\u003c\/li\u003e\n    \u003cli\u003eOptional Stone Valvetronic upgrade for full manual control, plug and play OBDII controller with handheld remote and auto rpm trigger\u003c\/li\u003e\n    \u003cli\u003eOPF and GPF fault prevention solution included, no ECU coding needed to avoid warning lights when used with this system\u003c\/li\u003e\n    \u003cli\u003eQuad outlet finishers for an aggressive OEM plus appearance\u003c\/li\u003e\n    \u003cli\u003eOne piece layout with machine welding for repeatable fit and a premium look\u003c\/li\u003e\n    \u003cli\u003eReduced cabin resonance for relaxed cruising and long distance comfort\u003c\/li\u003e\n    \u003cli\u003eIn house R and D, 3D scanning and reverse engineering for true OEM style alignment and clearances\u003c\/li\u003e\n    \u003cli\u003eDyno developed to deliver the Stone signature tone with performance focused flow\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eEngineering that makes a difference\u003c\/h3\u003e\n  \u003cp\u003eStone uses a 7 axis CNC bending process to achieve up to 98 percent roundness and limits outer bore wear to approximately 25 percent on 180 degree bends, helping minimise turbulence and weld stress. With scanning, reverse engineering and CNC bending combined, accuracy errors are kept under 0.025 mm for excellent fitment.\u003c\/p\u003e\n  \u003cp\u003eHigh heat areas benefit from crisscross and overlapping welding techniques that increase weld width and penetration. Direct spot welding with mechanical arms further boosts consistency and durability. The result is a beautifully finished system that looks as good as it performs.\u003c\/p\u003e\n\n  \u003ch3\u003eOEM integrated flaps, optional remote control\u003c\/h3\u003e\n  \u003cp\u003eChoose to keep the original ECU controlled valve behaviour for a seamless driving experience or add the Stone Valvetronic System. The Valvetronic pack includes dual valves, an easy plug in OBDII controller and a remote, so you can open or close the flaps on demand or set auto mode to open at your chosen rpm.\u003c\/p\u003e\n\n  \u003ch3\u003eOPF and GPF solution included\u003c\/h3\u003e\n  \u003cp\u003eSupplied with Stone’s OPF fix so owners of particulate filter equipped cars can run the AP534 without error codes. No coding required when the included solution is used with this exhaust.\u003c\/p\u003e\n\n  \u003ch3\u003eSound video\u003c\/h3\u003e\n  \u003cp\u003e\n    \u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/mOdHownExtY\" title=\"Stone Exhaust BMW M2 Competition S55 sound demonstration\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\n  \u003c\/p\u003e\n\n  \u003ch3\u003eInstalled photos\u003c\/h3\u003e\n  \u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/STONE_Exhaust_BMW_S55_F87_M2_Competition_Cat-Back_Valvetronic_Exhaust_-_1_600x600.jpg?v=1583256175\" alt=\"Stone Exhaust AP534 fitted to BMW F87 M2 Competition, underside view 1\" width=\"600\" height=\"600\"\u003e\u003c\/div\u003e\n  \u003cbr\u003e\n  \u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/STONE_Exhaust_BMW_S55_F87_M2_Competition_Cat-Back_Valvetronic_Exhaust_-_2_600x600.jpg?v=1583256256\" alt=\"Stone Exhaust AP534 installed on M2C S55, underside view 2\" width=\"600\" height=\"600\"\u003e\u003c\/div\u003e\n  \u003cbr\u003e\n  \u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/STONE_Exhaust_BMW_S55_F87_M2_Competition_Cat-Back_Valvetronic_Exhaust_-_3_600x600.jpg?v=1583256347\" alt=\"Stone Exhaust AP534 on BMW M2 Competition, detailed routing view\"\u003e\u003c\/div\u003e\n  \u003cbr\u003e\n  \u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/STONE_Exhaust_BMW_S55_F87_M2_Competition_Cat-Back_Valvetronic_Exhaust_-_4_600x600.jpg?v=1583256388\" alt=\"Stone Exhaust AP534 rear section for F87 M2C\"\u003e\u003c\/div\u003e\n  \u003cbr\u003e\n  \u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/STONE_Exhaust_BMW_S55_F87_M2_Competition_Cat-Back_Valvetronic_Exhaust_-_5_600x600.jpg?v=1583256440\" alt=\"Stone Exhaust AP534 quad tailpipes for BMW M2 Competition\"\u003e\u003c\/div\u003e\n  \u003cbr\u003e\n  \u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/STONE_Exhaust_BMW_S55_F87_M2_Competition_Cat-Back_Valvetronic_Exhaust_-_6_600x600.jpg?v=1583256505\" alt=\"Stone Exhaust AP534 weld quality and finish detail\"\u003e\u003c\/div\u003e\n  \u003cbr\u003e\n  \u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/STONE_Exhaust_BMW_S55_F87_M2_Competition_Cat-Back_Valvetronic_Exhaust_-_7_600x600.jpg?v=1583256554\" alt=\"Stone Exhaust AP534 precise fitment on BMW F87 M2C\"\u003e\u003c\/div\u003e\n  \u003cbr\u003e\n  \u003cdiv\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0284\/6300\/5795\/files\/STONE_Exhaust_BMW_S55_F87_M2_Competition_Cat-Back_Valvetronic_Exhaust_-_8_600x600.jpg?v=1583256621\" alt=\"Stone Exhaust AP534 quad outlets installed on M2 Competition\"\u003e\u003c\/div\u003e\n\n  \u003ch3\u003eCompatibility\u003c\/h3\u003e\n  \u003cp\u003eBMW F87 M2 Competition with the S55 engine, 2018 onwards.\u003c\/p\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\u003eAP534\u003c\/strong\u003e\u003c\/p\u003e\n\n  \u003ch3\u003eProfessional fitting\u003c\/h3\u003e\n  \u003cp\u003eHave it fitted by specialists. Book installation 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\u003ePopular search terms\u003c\/h3\u003e\n  \u003cp\u003eBMW M2C sports exhaust UK, F87 S55 rear silencer upgrade, valve controlled back box M2C, flap exhaust M2 Competition, BMW M2 quad tip system, OPF fix M2C, GPF solution BMW M2 Competition, remote valve controller OBD for M2C, BMW M2 Competition sound upgrade UK, performance rear section for F87, M2C exhaust with valves, daily friendly no drone exhaust, ECU integrated valved system M2C, plug and play OBD valve control, BMW M2 Competition quad outlet exhaust, UK supply and fit M2C exhaust.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Stone Exhaust","offers":[{"title":"Flat Cut Gloss Carbon Fiber (102mm)","offer_id":55977897230722,"sku":null,"price":3528.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/Stone_Exhaust_PORSCHE_718_Cayman_Boxster_SGTS_Cat-Back_Valvetronic_Exhaust_System_2.0T_2.5T_-9_1946x_2fb62a40-d0e3-4d31-a3a5-a46190a54b73.png?v=1763377208","url":"https:\/\/mjmodifications.co.uk\/products\/stone-exhaust-bmw-s55-f87-m2-competition-cat-back-exhaust-system","provider":"MJ Modifications","version":"1.0","type":"link"}