{"product_id":"milltek-gpf-opf-bypass-bmw-4-series-g82-m4-comp-s58-3-0-turbo-opf-gpf-20","title":"Milltek GPF\/OPF Bypass BMW 4 Series G82 M4 Comp S58 3.0 Turbo OPF\/GPF 20+","description":"\u003ch2\u003eMilltek GPF\/OPF Bypass for BMW 3 Series G80\/G81 M3 \u0026amp; M3 Competition S58 3.0 Turbo (OPF\/GPF Equipped Cars Only) inc Touring \u0026amp; XDrive Models (2020 onwards) – Filter Delete, Motorsport Use\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's GPF\/OPF bypass pipe for the BMW 4 Series G82 M4 \u0026amp; M4 Competition S58 3.0 Turbo (OPF\/GPF Equipped Cars Only). It replaces the section of pipe housing the factory petrol particulate filter with a straight-through pipe, clearing the last major restriction left in a modern turbocharged petrol exhaust once a de-cat and remap are already in place. It's offered in non-resonated or resonated versions, so you can pick the setup that suits how the car's used.\u003c\/p\u003e\n\u003cp\u003eIt's aimed at owners already running a de-cat and a supporting remap who want to clear the final restriction in the system, not a bolt-on for a car that needs to stay road legal.\u003c\/p\u003e\n\u003cp\u003eBecause it removes the particulate filter, it's intended for off-road and competition use. A car with the GPF\/OPF removed will fail an MOT emissions test and isn't legal to use on UK roads.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e GPF\/OPF Bypass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEC Approved:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRace System:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMade from T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration\u003c\/li\u003e\n\u003cli\u003eMandrel-bent pipework keeps a constant diameter through every bend for unrestricted flow\u003c\/li\u003e\n\u003cli\u003eStraight-through pipe in place of the factory petrol particulate filter (off-road and competition use only)\u003c\/li\u003e\n\u003cli\u003eResonated (quieter) or non-resonated (louder) versions\u003c\/li\u003e\n\u003cli\u003eDesigned, developed and manufactured in the UK by Milltek Sport\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBMW 3 Series G80\/G81 M3 \u0026amp; M3 Competition S58 3.0 Turbo (OPF\/GPF Equipped Cars Only) inc Touring \u0026amp; XDrive Models (2020 onwards)\u003c\/li\u003e\n\u003cli\u003eBMW 4 Series G82 M4 \u0026amp; M4 Competition S58 3.0 Turbo (OPF\/GPF Equipped Cars Only) (2020 onwards)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e the BMW 3 Series F80 M3, M3 Competition \u0026amp; M3 CS Saloon (OPF\/GPF Models Only), which needs the \u003ca href=\"\/products\/milltek-gpf-opf-bypass-bmw-3-series-f80-m3-comp-cs-saloon-opf-gpf-19-20\"\u003eMilltek GPF OPF Bypass BMW 3 Series F80 M3, M3 Comp M3 CS Saloon OPF\/GPF 19-20\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eThe fitting time varies by version; see the specification table for the option you choose. Some versions: OPF\/GPF Bypass - Non-Resonated (Louder) - Fits to OE Downpipes \u0026amp; Milltek Sport Axle Back System Only - Requires Stage 2 ECU Remap or OPF\/GPF Bypass Module (Available from www.leib-engineering.de). Some versions: OPF\/GPF Bypass - Non-Resonated (Louder) - Fits to OE Downpipes \u0026amp; OE Axle Back System Only (OE Requires Cutting) - Requires Stage 2 ECU Remap or OPF\/GPF Bypass Module (Available from www.leib-engineering.de). Some versions: OPF\/GPF Bypass - Resonated - Fits to OE Downpipes \u0026amp; Milltek Sport Axle Back System Only - Requires Stage 2 ECU Remap or OPF\/GPF Bypass Module (Available from www.leib-engineering.de). Some versions: OPF\/GPF Bypass - Resonated - Fits to OE Downpipes \u0026amp; OE Axle Back System Only (OE Requires Cutting) - Requires Stage 2 ECU Remap or OPF\/GPF Bypass Module (Available from www.leib-engineering.de). This work involves removing parts close to the turbo and engine, so we recommend fitting by a specialist with a ramp and suitable software support.\u003c\/p\u003e\n\u003ch3\u003eWhat's the difference between the resonated and non-resonated versions?\u003c\/h3\u003e\n\u003cp\u003eThe resonated version adds extra silencing for a quieter, more refined tone. The non-resonated version leaves it out, so it is louder and more aggressive.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the BMW 4 Series G82 M4 \u0026amp; M4 Competition S58 3.0 Turbo (OPF\/GPF Equipped Cars Only)?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the BMW 4 Series G82 M4 \u0026amp; M4 Competition S58 3.0 Turbo (OPF\/GPF Equipped Cars Only) as well as the other models in the fitment list above.\u003c\/p\u003e\n\u003ch3\u003eDoes it fit the BMW 3 Series F80 M3, M3 Competition \u0026amp; M3 CS Saloon (OPF\/GPF Models Only)?\u003c\/h3\u003e\n\u003cp\u003eNo. For that car, choose the \u003ca href=\"\/products\/milltek-gpf-opf-bypass-bmw-3-series-f80-m3-comp-cs-saloon-opf-gpf-19-20\"\u003eMilltek GPF OPF Bypass BMW 3 Series F80 M3, M3 Comp M3 CS Saloon OPF\/GPF 19-20\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eIs it road legal?\u003c\/h3\u003e\n\u003cp\u003eNo. Removing the particulate filter means the car will fail an MOT emissions test, so it is for off-road and competition use only.\u003c\/p\u003e\n\u003ch3\u003eDo I need a remap?\u003c\/h3\u003e\n\u003cp\u003eA suitable remap is strongly recommended, as the engine management needs to account for the change in flow and sensor readings. Speak to your tuner before fitting.\u003c\/p\u003e\n\u003ch3\u003eCan I use it with my standard exhaust?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists it for use with the factory (OE) exhaust system.\u003c\/p\u003e\n\u003ch3\u003eHow long does it take to fit?\u003c\/h3\u003e\n\u003cp\u003eIt depends on the version. Milltek's fitting time for each option is shown in its specification table.\u003c\/p\u003e\n\u003ch3\u003eWhat is it made from?\u003c\/h3\u003e\n\u003cp\u003eT304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration better than lower grades.\u003c\/p\u003e\n\u003ch3\u003eIs there a warranty?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek products are covered against defects in materials and workmanship. Contact us with your order number if you have a problem.\u003c\/p\u003e","brand":"Milltek","offers":[{"title":"Non-Resonated \/ 76mm \/ Fits Milltek System","offer_id":56392781267329,"sku":"MIL-SSXBM1194","price":783.42,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ 76mm \/ Fits OE System","offer_id":56392781300097,"sku":"MIL-SSXBM1196","price":777.39,"currency_code":"GBP","in_stock":true},{"title":"Resonated \/ 76mm \/ Fits Milltek System","offer_id":56392781332865,"sku":"MIL-SSXBM1193","price":998.46,"currency_code":"GBP","in_stock":true},{"title":"Resonated \/ 76mm \/ Fits OE System","offer_id":56392781365633,"sku":"MIL-SSXBM1195","price":992.43,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ 102mm \/ Fits Milltek System","offer_id":56392781398401,"sku":"MIL-SSXBM1337","price":807.47,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ 102mm \/ Fits OE System","offer_id":56392781431169,"sku":"MIL-SSXBM1335","price":801.45,"currency_code":"GBP","in_stock":true},{"title":"X-Pipe \/ 102mm \/ Fits Milltek System","offer_id":56392781463937,"sku":"MIL-SSXBM1338","price":852.68,"currency_code":"GBP","in_stock":true},{"title":"X-Pipe \/ 102mm \/ Fits OE System","offer_id":56392781496705,"sku":"MIL-SSXBM1336","price":846.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXBM1194_1_bba23791-45f4-4ff8-ae66-11131d22a07b.jpg?v=1791892392","url":"https:\/\/milltekexhaustshop.com\/products\/milltek-gpf-opf-bypass-bmw-4-series-g82-m4-comp-s58-3-0-turbo-opf-gpf-20","provider":"Milltek Exhaust Shop","version":"1.0","type":"link"}