{"product_id":"milltek-decat-downpipe-bmw-4-series-g82-m4-comp-s58-3-0-turbo-opf-gpf-20","title":"Milltek Decat Downpipe BMW 4 Series G82 M4 Comp S58 3.0 Turbo OPF\/GPF 20+","description":"\u003ch2\u003eMilltek Downpipe \u0026amp; De-cat for BMW 2 Series M2 Coupe (G87 S58 NAS Non-OPF\/GPF Models) (2023 onwards) – Maximum Flow, Motorsport Use\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's large-bore downpipe and de-cat for the BMW 4 Series G82 M4 \u0026amp; M4 Competition S58 3.0 Turbo (OPF\/GPF Equipped Cars Only). It replaces the factory downpipe with a larger-bore pipe and removes the catalytic converter entirely, clearing the single most restrictive point in the exhaust for the biggest flow gain available at this position in the system. It's usually fitted alongside a Stage 2 remap, since the ECU needs to be told to expect the different readings the lambda sensors give once the cat's gone.\u003c\/p\u003e\n\u003cp\u003eIt's built for owners already committed to a serious power upgrade rather than a casual bolt-on, so pair it with the matching Milltek cat-back system for the full effect.\u003c\/p\u003e\n\u003cp\u003eBecause it removes the cat, it's intended for off-road and competition use. A de-catted car 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 Large-bore Downpipe and De-cat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Diameter:\u003c\/strong\u003e 76.2mm (3\")\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\u003cli\u003e\n\u003cstrong\u003eFitting Time:\u003c\/strong\u003e approx. 3 to 4 hours (Milltek figure)\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\u003e76.2mm (3\") pipework\u003c\/li\u003e\n\u003cli\u003eRemoves the factory catalyst for maximum flow (off-road and competition use only)\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 2 Series M2 Coupe (G87 S58 NAS Non-OPF\/GPF Models) (2023 onwards)\u003c\/li\u003e\n\u003cli\u003eBMW 2 Series M2 Coupe (G87 S58 OPF\/GPF Models) (2023 onwards)\u003c\/li\u003e\n\u003cli\u003eBMW 3 Series G80 M3 \u0026amp; M3 Competition S58 3.0 Turbo (North American\/ROW Non-OPF\/GPF Cars Only) (2021 onwards)\u003c\/li\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 (North American\/ROW Non-OPF\/GPF Cars Only) (2021 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 2 Series M240i Coupé (G42 XDrive - NAS Non OPF\/GPF Models Only), which needs the \u003ca href=\"\/products\/milltek-decat-downpipe-bmw-2-series-m240i-coupe-g42-xdrive-nas-non-opf-gpf-22\"\u003eMilltek Downpipe \u0026amp; De-cat BMW 2 Series M240i Coupé (G42 XDrive - NAS Non OPF\/GPF Only) 22+\u003c\/a\u003e; the BMW 2 Series M240i Coupé (G42 XDrive OPF\/GPF Models Only - Non Hybrid Pre LCI), which needs the \u003ca href=\"\/products\/milltek-decat-downpipe-bmw-2-series-m240i-coupe-g42-xdrive-opf-gpf-non-hybrid-pre-lci-22-25\"\u003eMilltek Downpipe \u0026amp; De-cat BMW 2 Series M240i Coupé (G42 XDrive OPF\/GPF - Non Hybrid Pre LCI) 22-25\u003c\/a\u003e; the BMW 2 Series M2 Competition Coupé (F87), which needs the \u003ca href=\"\/products\/milltek-downpipes-with-cat-bypass-bmw-2-series-m2-comp-coupe-f87-18\"\u003eMilltek Downpipes \u0026amp; Cat Bypass Pipes BMW 2 Series M2 Comp Coupé F87 18+\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eMilltek quotes a fitting time of approx. 3 to 4 hours. Before ordering, note: Requires Stage 2 ECU Remap - Fits to OE and Milltek 3\" GPF Delete Sport Systems. 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\u003eUpgrade Further\u003c\/h3\u003e\n\u003cp\u003eAlso available from Milltek for this car: \u003ca href=\"\/products\/milltek-cat-back-exhaust-bmw-2-series-m2-coupe-g87-s58-nas-non-opf-gpf-23\"\u003eMilltek Cat-back Exhaust BMW 2 Series M2 Coupe G87 S58 NAS Non-OPF\/GPF 23+\u003c\/a\u003e, \u003ca href=\"\/products\/milltek-gpf-opf-bypass-bmw-2-series-m2-coupe-g87-s58-opf-gpf-23\"\u003eMilltek GPF\/OPF Bypass BMW 2 Series M2 Coupe G87 S58 OPF\/GPF 23+\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the BMW 2 Series M2 Coupe (G87 S58 OPF\/GPF Models)?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the BMW 2 Series M2 Coupe (G87 S58 OPF\/GPF Models) as well as the other models in the fitment list above.\u003c\/p\u003e\n\u003ch3\u003eDoes it fit the BMW 2 Series M240i Coupé (G42 XDrive - NAS Non OPF\/GPF Models Only)?\u003c\/h3\u003e\n\u003cp\u003eNo. For that car, choose the \u003ca href=\"\/products\/milltek-decat-downpipe-bmw-2-series-m240i-coupe-g42-xdrive-nas-non-opf-gpf-22\"\u003eMilltek Downpipe \u0026amp; De-cat BMW 2 Series M240i Coupé (G42 XDrive - NAS Non OPF\/GPF Only) 22+\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eIs it road legal?\u003c\/h3\u003e\n\u003cp\u003eNo. Removing the catalyst 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\u003eWill removing the cat cause a warning light?\u003c\/h3\u003e\n\u003cp\u003eWithout suitable software it is likely to, as the ECU expects the readings a working catalyst gives. This is why Milltek pairs it with a remap.\u003c\/p\u003e\n\u003ch3\u003eHow long does it take to fit?\u003c\/h3\u003e\n\u003cp\u003eMilltek quotes approx. 3 to 4 hours.\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":"Default Title","offer_id":56392781136257,"sku":"MIL-SSXBM1271","price":1121.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXBM1271_1_47172a8c-e3f3-48b9-8c43-c4ee89ad8f11.jpg?v=1791892376","url":"https:\/\/milltekexhaustshop.com\/products\/milltek-decat-downpipe-bmw-4-series-g82-m4-comp-s58-3-0-turbo-opf-gpf-20","provider":"Milltek Exhaust Shop","version":"1.0","type":"link"}