{"product_id":"milltek-decat-downpipe-audi-sq8-4-0-v8-bi-turbo-petrol-opf-gpf-pre-facelift-20-24","title":"Milltek Decat Downpipe Audi SQ8 4.0 V8 Bi-Turbo Petrol OPF\/GPF Pre-Facelift 20-24","description":"\u003ch2\u003eMilltek Downpipe \u0026amp; De-cat for Audi RSQ8 4.0 V8 Bi-Turbo (OPF\/GPF Equipped Models) (2020 onwards) – Maximum Flow, Motorsport Use\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's large-bore downpipe and de-cat for the Audi SQ8 4.0 V8 Bi-Turbo (Petrol OPF\/GPF Equipped Models Pre Facelift). 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. 3.5 to 4.5 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\u003eAudi RSQ8 4.0 V8 Bi-Turbo (OPF\/GPF Equipped Models) (2020 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi SQ7 4.0 V8 TT (Petrol OPF\/GPF Equipped Vehicles Pre Facelift) (2021-2024)\u003c\/li\u003e\n\u003cli\u003eAudi SQ8 4.0 V8 Bi-Turbo (Petrol OPF\/GPF Equipped Models Pre Facelift) (2020-2024)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e the Audi RSQ8 4.0 V8 Bi-Turbo (Non OPF\/GPF Equipped Models), which needs the \u003ca href=\"\/products\/milltek-decat-downpipe-audi-rsq8-4-0-v8-bi-turbo-non-opf-gpf-20\"\u003eMilltek Downpipe \u0026amp; De-cat Audi RSQ8 4.0 V8 Bi-Turbo Non OPF\/GPF 20+\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eMilltek quotes a fitting time of approx. 3.5 to 4.5 hours. Before ordering, note: Requires a Stage 2 ECU remap. 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\u003eWill it fit the Audi SQ7 4.0 V8 TT (Petrol OPF\/GPF Equipped Vehicles Pre Facelift)?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the Audi SQ7 4.0 V8 TT (Petrol OPF\/GPF Equipped Vehicles Pre Facelift) as well as the other models in the fitment list above.\u003c\/p\u003e\n\u003ch3\u003eDoes it fit the Audi RSQ8 4.0 V8 Bi-Turbo (Non OPF\/GPF Equipped Models)?\u003c\/h3\u003e\n\u003cp\u003eNo. For that car, choose the \u003ca href=\"\/products\/milltek-decat-downpipe-audi-rsq8-4-0-v8-bi-turbo-non-opf-gpf-20\"\u003eMilltek Downpipe \u0026amp; De-cat Audi RSQ8 4.0 V8 Bi-Turbo Non OPF\/GPF 20+\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: \"Requires a Stage 2 ECU remap\". Without suitable software the engine management is likely to log faults.\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. 3.5 to 4.5 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":56392752857473,"sku":"MIL-SSXAU902","price":2558.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU902_1.jpg?v=1791891742","url":"https:\/\/milltekexhaustshop.com\/products\/milltek-decat-downpipe-audi-sq8-4-0-v8-bi-turbo-petrol-opf-gpf-pre-facelift-20-24","provider":"Milltek Exhaust Shop","version":"1.0","type":"link"}