{"product_id":"milltek-decat-downpipe-audi-rs3-saloon-400ps-8y-mqb-evo-opf-gpf-21","title":"Milltek Decat Downpipe Audi RS3 Saloon 400PS 8Y MQB EVO OPF\/GPF 21+","description":"\u003ch2\u003eMilltek Downpipe \u0026amp; De-cat for Audi RS3 Saloon\/Sedan 400PS (8V MQB) - OPF\/GPF Models (2019 onwards) – Maximum Flow, Motorsport Use\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's large-bore downpipe and de-cat for the Audi RS3 Saloon\/Sedan 400PS (8Y MQB EVO) - OPF\/GPF Models. 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. It's offered in a choice of cat (De-cat, De-cat with GPF Delete), so you can pick the setup that suits how the car's used.\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\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\u003eAudi RS3 Saloon\/Sedan 400PS (8V MQB) - OPF\/GPF Models (2019 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi RS3 Saloon\/Sedan 400PS (8Y MQB EVO) - OPF\/GPF Models (2021 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi RS3 Sportback 400PS (8V MQB - Facelift Only) - OPF\/GPF Models (2019 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi RS3 Sportback 400PS (8Y MQB EVO) - OPF\/GPF Models (2021 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi RSQ3 2.5T Sportback \u0026amp; SUV (OPF\/GPF Equipped Models Only) (2020 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi TT Mk3 TTRS 2.5TFSI Quattro (OPF\/GPF Models) (2019 onwards)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNot every version fits every car in this list. Check the fitment shown for the option you select.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e the Audi RS3 Saloon\/Sedan 400PS (8V MQB) - Non-OPF\/GPF Models, which needs the \u003ca href=\"\/products\/milltek-decat-downpipe-audi-rs3-saloon-400ps-8v-mqb-non-opf-gpf-17\"\u003eMilltek Downpipe \u0026amp; De-cat Audi RS3 Saloon 400PS 8V MQB - Non-OPF\/GPF 17+\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eSome versions: Fits both OE and Milltek Sport Cat Back Systems - Requires Stage 2 ECU Software - NOTE to Customers - Due to Design of Turbo Waste Gate fitting a decat can cause metallic rattle to be heard more than the OE Cat Downpipe. Some versions: V2 Downpipe with Decat \u0026amp; OPF\/GPF Bypass - Fits both OE and Milltek Sport Cat Back Systems - NOTE to Customers - Due to Design of Turbo Waste Gate fitting a decat can cause metallic rattle to be heard more than the OE Cat Downpipe - Requires stage 2 ECU software. 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-audi-rs3-sportback-8y-opf-gpf-21\"\u003eMilltek Filter-back Exhaust Audi RS3 Sportback 8Y OPF\/GPF 21+\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the Audi RS3 Saloon\/Sedan 400PS (8Y MQB EVO) - OPF\/GPF Models?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the Audi RS3 Saloon\/Sedan 400PS (8Y MQB EVO) - OPF\/GPF Models as well as the other models in the fitment list above.\u003c\/p\u003e\n\u003ch3\u003eDoes it fit the Audi RS3 Saloon\/Sedan 400PS (8V MQB) - Non-OPF\/GPF Models?\u003c\/h3\u003e\n\u003cp\u003eNo. For that car, choose the \u003ca href=\"\/products\/milltek-decat-downpipe-audi-rs3-saloon-400ps-8v-mqb-non-opf-gpf-17\"\u003eMilltek Downpipe \u0026amp; De-cat Audi RS3 Saloon 400PS 8V MQB - Non-OPF\/GPF 17+\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\u003eYes. Milltek notes: \"Fits both OE and Milltek Sport Cat Back Systems - Requires Stage 2 ECU Software - NOTE to Customers - Due to Design of Turbo Waste Gate fitting a decat can cause metallic rattle to be heard more than the OE Cat Downpipe\". Without suitable software the engine management is likely to log faults.\u003c\/p\u003e\n\u003ch3\u003eCan I use it with my standard exhaust?\u003c\/h3\u003e\n\u003cp\u003eIt depends on the version. Some are made for the factory (OE) system and others for the Milltek cat-back, so check the notes for the option you choose.\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\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":"De-cat","offer_id":56392684634497,"sku":"MIL-SSXAU817","price":836.95,"currency_code":"GBP","in_stock":true},{"title":"De-cat with GPF Delete","offer_id":56392684667265,"sku":"MIL-SSXAU897","price":1175.63,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU817_1_bef3f423-bab9-419b-97e8-1483b2a2ad19.jpg?v=1791890619","url":"https:\/\/milltekexhaustshop.com\/products\/milltek-decat-downpipe-audi-rs3-saloon-400ps-8y-mqb-evo-opf-gpf-21","provider":"Milltek Exhaust Shop","version":"1.0","type":"link"}