{"product_id":"remus-bmw-g80-g82-racing-gpf-back-exhaust-system-m3-m3-competition-m4-m4-competition","title":"Remus Valved OPF\/GPF-Back Switchable Exhaust for BMW M3 G80 \u0026 M4 G82 (2021+) incl. Competition – Stainless 76mm Performance Rear System\/Backbox, Cat-Back Style Sports Exhaust, Valve-Controlled Muffler\/Rear Silencer, Tailpipe Options","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003ch2\u003eRemus OPF-back Switchable Rear System for G80 M3 and G82 M4 including Competition models\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Transform the character of your G-series M car with this Austrian-made, valve-controlled OPF-back rear section. Engineered for the S58-powered G80 saloon and G82 coupé from 2021 onwards, it brings a harder-edged motorsport tone, freer breathing and beautiful craftsmanship in stainless steel. If you are hunting for a BMW M3 M4 sports exhaust upgrade, rear silencer replacement, OPF-back performance system, flap-controlled backbox or a premium valved muffler assembly for track use, this is the enthusiast favourite.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eHighlights\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eValve-controlled sound using the factory actuator motors and electronics\u003c\/li\u003e\n    \u003cli\u003eShot-blasted finish with 100 percent stainless steel construction\u003c\/li\u003e\n    \u003cli\u003eLarger 76 mm pipework for reduced back pressure and sharper response\u003c\/li\u003e\n    \u003cli\u003ePrecision fit to OEM mounting points for a clean, bolt-on install\u003c\/li\u003e\n    \u003cli\u003eHand built in Austria with a 24 month manufacturer warranty\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat is included\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eRemus Racing centre sport exhaust with integrated valves\u003c\/li\u003e\n    \u003cli\u003eConnection tube set with spherical joint\u003c\/li\u003e\n    \u003cli\u003eFront silencer replacement tube for the OPF-back configuration\u003c\/li\u003e\n    \u003cli\u003eOne tailpipe set required and supplied separately\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Tailpipe tips are not included. Choose your preferred finish below to complete the system.\u003c\/p\u003e\n\n  \u003ch3\u003eTailpipe options sold separately\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eStainless steel chromed angled rolled edge Ø 102 mm\u003c\/li\u003e\n    \u003cli\u003eStainless steel chromed angled straight cut Ø 102 mm\u003c\/li\u003e\n    \u003cli\u003eStainless steel chromed straight cut with carbon insert Ø 98 mm\u003c\/li\u003e\n    \u003cli\u003eStainless steel black chrome straight cut with carbon insert Ø 98 mm\u003c\/li\u003e\n    \u003cli\u003eCarbon tailpipe set with titanium internals Ø 102 mm\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eTechnical information\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eOEM tube diameter 70 mm\u003c\/li\u003e\n    \u003cli\u003eRemus tube diameter 76 mm\u003c\/li\u003e\n    \u003cli\u003eValves operate via the original BMW actuators and vehicle electronics\u003c\/li\u003e\n    \u003cli\u003eInstalls on the standard mounting points. Cutting of the factory exhaust is required\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhy owners choose this system\u003c\/h3\u003e\n  \u003cp\u003e\n    This OPF-back upgrade unlocks a deeper, more purposeful soundtrack while keeping cabin refinement manageable when the valves are closed. The flow-optimised design helps the S58 breathe more freely on circuit. At MJ Modifications we have fitted and supplied multiple Remus systems for the G80 and G82 platform and feedback on tone, fit and finish has been consistently excellent. Our customers love the quality, the switchable character and the OEM-level integration of the valve control.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eVehicle suitability\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eBMW G80 M3 2021 onwards with or without GPF\u003c\/li\u003e\n    \u003cli\u003eBMW G80 M3 Competition 2021 onwards with or without GPF\u003c\/li\u003e\n    \u003cli\u003eBMW G82 M4 2021 onwards with or without GPF\u003c\/li\u003e\n    \u003cli\u003eBMW G82 M4 Competition 2021 onwards with or without GPF\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eFitting and support\u003c\/h3\u003e\n  \u003cp\u003e\n    Professional installation recommended. MJ Modifications offers fitting at our Warwickshire workshop. Request a quote at \n    \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCompatibility check\u003c\/h3\u003e\n  \u003cp\u003e\n    We verify compatibility before dispatch. Please provide your UK registration or the last 7 characters of your VIN at checkout.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eLegal and usage notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eRacing item with no ECE type approval\u003c\/li\u003e\n    \u003cli\u003eUse on public roads is generally not permitted\u003c\/li\u003e\n    \u003cli\u003eCutting of the stock system is required for installation\u003c\/li\u003e\n    \u003cli\u003eFor track-only applications an ECU calibration may be beneficial to optimise performance and avoid potential warnings\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003ePart numbers\u003c\/h3\u003e\n  \u003cp\u003e081021 1300 + 081021 1400 + 081021 1510\u003c\/p\u003e\n\n  \u003ch3\u003eManufacturer and warranty\u003c\/h3\u003e\n  \u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Remus\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2 year Remus warranty non transferable\u003c\/p\u003e\n\n  \u003ch3\u003eSearch friendly terms\u003c\/h3\u003e\n  \u003cp\u003e\n    BMW M3 G80 rear section, BMW M4 G82 rear box, S58 valved muffler, OPF back exhaust, OPF-back system, flap exhaust BMW M, stainless steel backbox, performance rear silencer, sports exhaust G80, sports exhaust G82, M3 Competition valve control, M4 Competition valve control, track exhaust system, Remus rear exhaust BMW, carbon exhaust tips BMW, 76 mm system BMW M3 M4, BMW M exhaust upgrade, performance muffler assembly, rear silencer upgrade, switchable exhaust BMW S58, BMW M3 loud exhaust track only.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Remus","offers":[{"title":"Default Title","offer_id":56005772673410,"sku":null,"price":2044.28,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/RemusBMWG80G82RacingGPF-BackExhaustSystem_M3_M3Competition_M4_M4Competition_-1_1946x_1f1bb5ef-10d5-4218-b741-41caffcbc650.jpg?v=1764022282","url":"https:\/\/mjmodifications.co.uk\/products\/remus-bmw-g80-g82-racing-gpf-back-exhaust-system-m3-m3-competition-m4-m4-competition","provider":"MJ Modifications","version":"1.0","type":"link"}