{"product_id":"milltek-cat-replacement-pipe-audi-s5-3-0-v6-turbo-sportback-b9-non-gpf-sport-diff-without-brace-bars-lhd-17","title":"Milltek Cat Replacement Pipe Audi S5 3.0 V6 Turbo Sportback B9 Non-GPF Sport Diff without Brace Bars LHD 17+","description":"\u003ch2\u003eMilltek Cat Replacement Pipe for Audi S4 3.0 Turbo V6 B9 - Saloon\/Sedan \u0026amp; Avant (NON GPF ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only (2016 onwards) – Maximum Flow, Motorsport Use\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's large-bore downpipe and de-cat for the Audi S5 3.0 V6 Turbo Sportback B9 (NON GPF ONLY - Sport Diff Models Only \u0026amp; without Brace Bars) - Left Hand Drive 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 Cat Replacement Pipe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Diameter:\u003c\/strong\u003e 63.5mm (2.5\")\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. 1 to 1.5 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\u003e63.5mm (2.5\") 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 S4 3.0 Turbo V6 B9 - Saloon\/Sedan \u0026amp; Avant (NON GPF ONLY - Non Sport Diff Models) - Left Hand Drive Cars Only (2016 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S4 3.0 Turbo V6 B9 - Saloon\/Sedan \u0026amp; Avant (NON GPF ONLY - Non Sport Diff Models) - Right Hand Drive Cars Only (2016 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S4 3.0 Turbo V6 B9 - Saloon\/Sedan \u0026amp; Avant (NON GPF ONLY - Sport Diff Models Only \u0026amp; Without Brace Bars) - Left Hand Drive Cars Only (2016 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S4 3.0 Turbo V6 B9 - Saloon\/Sedan \u0026amp; Avant (NON GPF ONLY - Sport Diff Models Only \u0026amp; Without Brace Bars) - Right Hand Drive Cars Only (2016 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Coupe Only B9 (LCI NON GPF ONLY - Sport Diff Models Only \u0026amp; WITH Brace Bars) - Left Hand Drive Cars Only (2019 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Coupe Only B9 (NON GPF ONLY - Sport Diff Models Only \u0026amp; WITH Brace Bars) - Right Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Coupe Only B9 (NON GPF ONLY - Sport Diff Models Only \u0026amp; Without Brace Bars) - Left Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Coupe Only B9 (NON GPF ONLY - Sport Diff Models Only \u0026amp; Without Brace Bars) - Right Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Coupe\/Cabrio B9 (NON GPF ONLY - Non Sport Diff Models Only) - Left Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Coupe\/Cabrio B9 (NON GPF ONLY - Non Sport Diff Models Only) - Right Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Sportback B9 (LCI NON GPF ONLY - Sport Diff Models Only \u0026amp; WITH Brace Bars) - Left Hand Drive Cars Only (2019 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Sportback B9 (NON GPF ONLY - Non Sport Diff Models Only) - Left Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Sportback B9 (NON GPF ONLY - Non Sport Diff Models Only) - Right Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Sportback B9 (NON GPF ONLY - Sport Diff Models Only \u0026amp; WITH Brace Bars) - Right Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Sportback B9 (NON GPF ONLY - Sport Diff Models Only \u0026amp; without Brace Bars) - Left Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 V6 Turbo Sportback B9 (NON GPF ONLY - Sport Diff Models Only \u0026amp; without Brace Bars) - Right Hand Drive Cars Only (2017 onwards)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e Audi S4 3.0 GPF ONLY - Non Sport Diff models, or any model not listed above.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eMilltek quotes a fitting time of approx. 1 to 1.5 hours. Before ordering, note: Cat Bypass, fits with OE and Milltek Sport Cat back 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-active-valve-control-audi-s4-3-0-turbo-v6-b9-saloon-avant-non-gpf-non-sport-diff-lhd-16\"\u003eMilltek Active Valve Control Audi S4 3.0 Turbo V6 B9 - Saloon \u0026amp; Avant (NON GPF - Non Sport Diff Models) - Left Hand Drive Cars 16+\u003c\/a\u003e, \u003ca href=\"\/products\/milltek-cat-back-exhaust-audi-s4-3-0-turbo-v6-b9-saloon-avant-non-gpf-non-sport-diff-lhd-16\"\u003eMilltek Cat-back Exhaust Audi S4 3.0 Turbo V6 B9 - Saloon \u0026amp; Avant (NON GPF - Non Sport Diff Models) - Left Hand Drive Cars 16+\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the Audi S4 3.0 Turbo V6 B9 - Saloon\/Sedan \u0026amp; Avant (NON GPF ONLY - Non Sport Diff Models) - Right Hand Drive Cars Only?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the Audi S4 3.0 Turbo V6 B9 - Saloon\/Sedan \u0026amp; Avant (NON GPF ONLY - Non Sport Diff Models) - Right Hand Drive Cars Only as well as the other models in the fitment list above.\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\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\u003eHow long does it take to fit?\u003c\/h3\u003e\n\u003cp\u003eMilltek quotes approx. 1 to 1.5 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":56392744206721,"sku":"MIL-SSXAU674","price":653.23,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU674_1.jpg?v=1791891563","url":"https:\/\/milltekexhaustshop.com\/products\/milltek-cat-replacement-pipe-audi-s5-3-0-v6-turbo-sportback-b9-non-gpf-sport-diff-without-brace-bars-lhd-17","provider":"Milltek Exhaust Shop","version":"1.0","type":"link"}