{"product_id":"milltek-sport-bmw-g8x-m3-m4-opf-gpf-back-with-centre-resonator-bypass-system-with-gt-115-polished-trims","title":"Milltek Sport BMW G8X M3\/M4 - OPF\/GPF Back with Centre Resonator Bypass System with GT-115 Polished Trims","description":"\u003cp\u003eElevate the acoustic and visual presence of your BMW M3 or M4 G8X with the Milltek Sport OPF\/GPF Back System with Centre Resonator Bypass, finished in polished GT-115 tips. This comprehensive exhaust upgrade combines the OPF\/GPF-Back design with a centre resonator bypass for a dramatically enhanced exhaust note that truly reflects the performance potential of the S58 engine.\u003c\/p\u003e\u003cp\u003eThe centre resonator bypass eliminates the factory resonator, removing a significant flow restriction and contributing to a more linear, unrestricted exhaust note. Combined with the OPF\/GPF-Back section — designed to compensate for the sound-dampening effects of the factory particulate filter — this system transforms the acoustic character of the M3 and M4.\u003c\/p\u003e\u003cp\u003eFinished with classic polished GT-115 round exhaust tips, this system adds a premium finishing touch to the rear of the G8X. Compatible with all G8X variants including OPF\/GPF-equipped European models, Non-OPF North American and ROW cars, M3 Touring, and xDrive models.\u003c\/p\u003e\u003cp\u003eManufactured from 304L aircraft-grade stainless steel and made in the UK.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFitment: BMW M3 G80\/G81 (2020+) \u0026amp; M4 G82 (2020+) — OPF\/GPF \u0026amp; Non-OPF variants\u003c\/li\u003e\n\u003cli\u003ePipe diameter: 80mm\u003c\/li\u003e\n\u003cli\u003eTip style: Polished GT-115 round tips\u003c\/li\u003e\n\u003cli\u003eFitting time: 1.5–2 hours\u003c\/li\u003e\n\u003cli\u003eMade in the UK\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSKU: SSXBM1319\u003c\/p\u003e","brand":"Milltek","offers":[{"title":"Default Title","offer_id":58335700484480,"sku":"SSXBM1319","price":2537.93,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0720\/7557\/5573\/files\/SSXBM1319_1.jpg?v=1782477755","url":"https:\/\/stringtheorygarage.com\/en-im\/products\/milltek-sport-bmw-g8x-m3-m4-opf-gpf-back-with-centre-resonator-bypass-system-with-gt-115-polished-trims","provider":"String Theory Garage","version":"1.0","type":"link"}