{"product_id":"milltek-gpf-opf-bypass-bmw-1-series-m135i-xdrive-5dr-f70-opf-gpf-24","title":"Milltek GPF\/OPF Bypass BMW 1 Series M135i xDrive 5dr F70 OPF\/GPF 24+","description":"\u003ch2\u003eMilltek GPF\/OPF Bypass for BMW 1 Series M135i xDrive 5 Door (F70 OPF\/GPF Equipped) (2024 onwards) – Filter Delete, Motorsport Use\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's GPF\/OPF bypass pipe for the BMW 1 Series M135i xDrive 5 Door (F70 OPF\/GPF Equipped). 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 OE downpipe and milltek OPF back system only or OE downpipe and OE OPF back system only 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\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\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\u003eStraight-through pipe in place of the factory petrol particulate filter (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\u003cli\u003eBMW 1 Series M135i xDrive 5 Door (F70 OPF\/GPF Equipped) (2024 onwards)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e the BMW 1 Series 128ti 5 Door (F40 OPF\/GPF Equipped), which needs the \u003ca href=\"\/products\/milltek-gpf-opf-bypass-bmw-1-series-128ti-5dr-f40-opf-gpf-21\"\u003eMilltek GPF\/OPF Bypass BMW 1 Series 128ti 5dr F40 OPF\/GPF 21+\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eSome versions: To fit to OE downpipe and Milltek OPF Back System Only. Some versions: To fit to OE downpipe and OE OPF Back System Only. 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-filter-back-exhaust-bmw-1-series-m135i-xdrive-5dr-f70-opf-gpf-24\"\u003eMilltek Filter-back Exhaust BMW 1 Series M135i xDrive 5dr F70 OPF\/GPF 24+\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eDoes it fit the BMW 1 Series 128ti 5 Door (F40 OPF\/GPF Equipped)?\u003c\/h3\u003e\n\u003cp\u003eNo. For that car, choose the \u003ca href=\"\/products\/milltek-gpf-opf-bypass-bmw-1-series-128ti-5dr-f40-opf-gpf-21\"\u003eMilltek GPF\/OPF Bypass BMW 1 Series 128ti 5dr F40 OPF\/GPF 21+\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\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":"OE downpipe and Milltek OPF Back System Only","offer_id":56392760492417,"sku":"MIL-SSXBM1421","price":228.51,"currency_code":"GBP","in_stock":true},{"title":"OE downpipe and OE OPF Back System Only","offer_id":56392760525185,"sku":"MIL-SSXBM1420","price":225.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXBM1421_1.jpg?v=1791891942","url":"https:\/\/milltekexhaustshop.com\/products\/milltek-gpf-opf-bypass-bmw-1-series-m135i-xdrive-5dr-f70-opf-gpf-24","provider":"Milltek Exhaust Shop","version":"1.0","type":"link"}