{"title":"Milltek Audi S6 Performance Exhaust Systems","description":"\u003cp\u003eMilltek parts for the Audi S6 cover three generations: the C6 5.2 V10 FSI quattro from 2006 to 2012, the C7 4.0 TFSI quattro from 2012 to 2018 and the C8 3.0 TDI Saloon and Avant from 2019. The C7 has the widest choice, with a cat-back system, a ValveSonic kit, sports cat downpipes, downpipes with cat bypass and Active Valve Control. Head back to the \u003ca href=\"\/collections\/audi-performance-exhaust-systems\"\u003eMilltek Audi range\u003c\/a\u003e for other models.\u003c\/p\u003e","products":[{"product_id":"milltek-active-sound-control-audi-s6-3-0-tdi-c8-saloon-avant-diesel-19","title":"Milltek Active Sound Control Audi S6 3.0 TDI C8 Saloon Avant Diesel 19+","description":"\u003ch2\u003eMilltek Active Sound Control for Audi A6 3.0 Bi-TDI C7 (2011-2018) – Adjustable Engine Sound\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's active sound control system for the Audi S6 3.0 TDI C8 Saloon\/Avant (Diesel). It works with the vehicle's existing valve or flap system, giving you control over the exhaust note from inside the car without any physical changes to the pipework itself, so you can move between a quiet cruising tone and a sharper, more aggressive sound whenever you like.\u003c\/p\u003e\n\u003cp\u003eIt suits owners whose car already has a factory valve system they'd like more control over, rather than those looking for a change in outright flow or volume.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e Active Sound Control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValvesonic:\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\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudi A6 3.0 Bi-TDI C7 (2011-2018)\u003c\/li\u003e\n\u003cli\u003eAudi A7 C7 3.0 Bi-TDI (2011-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S4 3.0 Bi-TDI B9 Saloon\/Avant (Diesel) (2019 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 Bi-TDI B9 Coupe (Diesel) (2019 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S6 3.0 TDI C8 Saloon\/Avant (Diesel) (2019 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi S7 Sportback 3.0 TDI C8 (Diesel) (2019 onwards)\u003c\/li\u003e\n\u003cli\u003eAudi SQ5 3.0 V6 Bi-TDI (Diesel) (2014-2016)\u003c\/li\u003e\n\u003cli\u003eAudi SQ7 4.0 V8 TDI (2016-2020)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e any model, engine or body style not listed above. Check your car before ordering.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eMilltek quotes a fitting time of approx. 1 to 1.5 hours. This involves connecting to the car's wiring and exhaust valves, so we recommend fitting by a specialist familiar with the car's electrics.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the Audi A7 C7 3.0 Bi-TDI?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the Audi A7 C7 3.0 Bi-TDI as well as the other models in the fitment list above.\u003c\/p\u003e\n\u003ch3\u003eDoes it change the exhaust pipework?\u003c\/h3\u003e\n\u003cp\u003eNo. It is an electronic sound system, so the exhaust itself stays as it is.\u003c\/p\u003e\n\u003ch3\u003eWhat does it work with?\u003c\/h3\u003e\n\u003cp\u003eMilltek notes: \"V2 with 8 Selectable Sound Files\". Check this matches your current exhaust before ordering.\u003c\/p\u003e\n\u003ch3\u003eIs this a complete exhaust system?\u003c\/h3\u003e\n\u003cp\u003eNo. It is designed to be used with the system or factory parts described above, rather than as a complete exhaust on its own.\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\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":56392745517441,"sku":"MIL-SSXAU668","price":852.43,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU668_1_ff505f6b-62d3-4c6d-8651-2b8941544fbd.jpg?v=1791891594"},{"product_id":"milltek-valvesonic-kit-for-non-valvesonic-cat-back-audi-s6-4-0-tfsi-c7-quattro-12-18","title":"Milltek ValveSonic Kit for Non-ValveSonic Cat Back Audi S6 4.0 TFSI C7 Quattro 12-18","description":"\u003ch2\u003eMilltek required for fitment with non-ValveSonic Milltek cat-back systems for Audi S3 2.0 TFSI quattro 3-Door 8V\/8V.2 (Non-GPF Equipped Models Only) (2013-2018) – Genuine Milltek Fitment Part\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's ValveSonic system for the Audi S6 4.0 TFSI C7 quattro. It adds Milltek's electronically-operated valve to the system, opening a less restrictive path through the silencer that stays closed for a refined, near-standard tone and opens under load or on demand for a louder, more open sound.\u003c\/p\u003e\n\u003cp\u003eIt's the option to go for if you want the flexibility to keep the car quiet day to day and switch to the full exhaust note whenever you actually want to hear it.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e Additional parts\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 No\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\u003eGenuine Milltek part designed to work with the matching Milltek system\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 S3 2.0 TFSI quattro 3-Door 8V\/8V.2 (Non-GPF Equipped Models Only) (2013-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S3 2.0 TFSI quattro Saloon \u0026amp; Cabrio 8V\/8V.2 (Non-GPF Equipped Models Only) (2013-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S3 2.0 TFSI quattro Sportback 8V\/8V.2 (Non-GPF Equipped Models Only) (2013-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S6 4.0 TFSI C7 quattro (2012-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S7 Sportback 4.0 TFSI quattro S tronic (2012-2018)\u003c\/li\u003e\n\u003cli\u003eVolkswagen Golf MK7 R 2.0 TSI 300PS (ECE Approved \u0026amp; 76.2mm Systems) (2014-2016)\u003c\/li\u003e\n\u003cli\u003eVolkswagen Golf Mk7.5 R 2.0 TSI 310PS (Non-GPF Equipped Models Only) - 76mm \u0026amp; EC Approved Systems (2017-2021)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e Audi S3 2.0 GPF models, or any model not listed above.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, note: Only required for fitment with non-ValveSonic Milltek cat-back systems. We recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.\u003c\/p\u003e\n\u003ch3\u003eUpgrade Further\u003c\/h3\u003e\n\u003cp\u003eAlso available from Milltek for this car: \u003ca href=\"\/products\/milltek-turbo-back-exhaust-with-sports-cat-audi-s3-2-0-tfsi-quattro-3dr-8v-8v-2-non-gpf-13-18\"\u003eMilltek Turbo-back Exhaust \u0026amp; Sports Cat Audi S3 2.0 TFSI Quattro 3dr 8V 8V.2 Non-GPF 13-18\u003c\/a\u003e, \u003ca href=\"\/products\/milltek-sports-cat-downpipe-audi-s3-2-0-tfsi-quattro-3dr-8v-8v-2-non-gpf-13-18\"\u003eMilltek Downpipe \u0026amp; Sports Cat Audi S3 2.0 TFSI Quattro 3dr 8V 8V.2 Non-GPF 13-18\u003c\/a\u003e, \u003ca href=\"\/products\/milltek-active-valve-control-volkswagen-golf-mk7-r-2-0-tsi-300ps-ece-approved-76-2mm-14-16\"\u003eMilltek Active Valve Control Volkswagen Golf Mk7 R 2.0 TSI 300PS ECE Approved \u0026amp; 76.2mm Systems 14-16\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the Audi S3 2.0 TFSI quattro Saloon \u0026amp; Cabrio 8V\/8V.2 (Non-GPF Equipped Models Only)?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the Audi S3 2.0 TFSI quattro Saloon \u0026amp; Cabrio 8V\/8V.2 (Non-GPF Equipped Models 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\u003eMilltek does not list EC approval for this part. Any exhaust used on the road must still meet noise and emissions rules, so check the requirements where you live.\u003c\/p\u003e\n\u003ch3\u003eWhat does it work with?\u003c\/h3\u003e\n\u003cp\u003eMilltek notes: \"Only required for fitment with non-ValveSonic Milltek cat-back systems\". Check this matches your current exhaust before ordering.\u003c\/p\u003e\n\u003ch3\u003eIs this a complete exhaust system?\u003c\/h3\u003e\n\u003cp\u003eNo. It is designed to be used with the system or factory parts described above, rather than as a complete exhaust on its own.\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":56392745582977,"sku":"MIL-SSXAU405","price":60.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU405_1_1e15c801-9ee0-4872-9f5f-3ded1947e28e.jpg?v=1791891601"},{"product_id":"milltek-active-valve-control-audi-s6-4-0-tfsi-c7-quattro-12-18","title":"Milltek Active Valve Control Audi S6 4.0 TFSI C7 Quattro 12-18","description":"\u003ch2\u003eMilltek Active Valve Control for Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (2013-2018) – Switchable Exhaust Volume\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's active valve control system for the Audi S6 4.0 TFSI C7 quattro. It adds an electronically-operated valve to an existing Milltek system, opening a second, less restrictive path through the silencer that stays closed for a refined, near-standard tone around town and opens under load or at the press of a button for a louder, more open sound.\u003c\/p\u003e\n\u003cp\u003eIt's the option to go for if you want the flexibility to keep the car quiet for early starts and long motorway runs, then switch to the full exhaust note whenever you actually want to hear it, without swapping any hardware.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e Active Valve Control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValvesonic:\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\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (2013-2018)\u003c\/li\u003e\n\u003cli\u003eAudi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition (2013-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S6 4.0 TFSI C7 quattro (2012-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S7 Sportback 4.0 TFSI quattro S tronic (2012-2018)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e any model, engine or body style not listed above. Check your car before ordering.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eMilltek quotes a fitting time of approx. 1 to 1.5 hours. This involves connecting to the car's wiring and exhaust valves, so we recommend fitting by a specialist familiar with the car's electrics.\u003c\/p\u003e\n\u003ch3\u003eUpgrade Further\u003c\/h3\u003e\n\u003cp\u003eAlso available from Milltek for this car: \u003ca href=\"\/products\/milltek-downpipes-with-cat-bypass-audi-rs6-c7-4-0-tfsi-biturbo-quattro-13-18\"\u003eMilltek Downpipes \u0026amp; Cat Bypass Pipes Audi RS6 C7 4.0 TFSI biturbo Quattro 13-18\u003c\/a\u003e, \u003ca href=\"\/products\/milltek-cat-back-exhaust-audi-rs6-c7-4-0-tfsi-biturbo-quattro-13-18\"\u003eMilltek Cat-back Exhaust Audi RS6 C7 4.0 TFSI biturbo Quattro 13-18\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the Audi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the Audi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition as well as the other models in the fitment list above.\u003c\/p\u003e\n\u003ch3\u003eHow is it controlled?\u003c\/h3\u003e\n\u003cp\u003eDepending on the version, it is controlled using the car's own drive select modes or ESP button.\u003c\/p\u003e\n\u003ch3\u003eWill the car be louder all the time?\u003c\/h3\u003e\n\u003cp\u003eNo. With the valve closed the tone stays close to standard; open it when you want the full exhaust note.\u003c\/p\u003e\n\u003ch3\u003eWhat does it work with?\u003c\/h3\u003e\n\u003cp\u003eMilltek notes: \"Active Valve Control System (Changes default valve behaviours, override with ESP button to open on demand)\". Check this matches your current exhaust before ordering.\u003c\/p\u003e\n\u003ch3\u003eIs this a complete exhaust system?\u003c\/h3\u003e\n\u003cp\u003eNo. It is designed to be used with the system or factory parts described above, rather than as a complete exhaust on its own.\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\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":56392745615745,"sku":"MIL-SSXAU675","price":550.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU675_1.jpg?v=1791891604"},{"product_id":"milltek-downpipes-with-cat-bypass-audi-s6-4-0-tfsi-c7-quattro-12-18","title":"Milltek Downpipes with Cat Bypass Audi S6 4.0 TFSI C7 Quattro 12-18","description":"\u003ch2\u003eMilltek Downpipes \u0026amp; Cat Bypass Pipes for Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (2013-2018) – Maximum Flow, Motorsport Use\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's large-bore downpipe and de-cat for the Audi S6 4.0 TFSI C7 quattro. 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 versions to suit the factory or a Milltek system, 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 Downpipes and Cat Bypass Pipes\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 RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (2013-2018)\u003c\/li\u003e\n\u003cli\u003eAudi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition (2013-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S6 4.0 TFSI C7 quattro (2012-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S7 Sportback 4.0 TFSI quattro S tronic (2012-2018)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e any model, engine or body style not listed above. Check your car before ordering.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eSome versions: Larger-bore 76mm Downpipes with cat bypass pipes for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the Milltek Sport cat-back system and requires a stage 2 ECU remap. (lambda cables need extending). Some versions: Larger-bore 76mm Downpipes with cat bypass pipes for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the OE cat-back system and requires a stage 2 ECU remap. (lambda cables need extending). 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-rs6-c7-4-0-tfsi-biturbo-quattro-13-18\"\u003eMilltek Active Valve Control Audi RS6 C7 4.0 TFSI biturbo Quattro 13-18\u003c\/a\u003e, \u003ca href=\"\/products\/milltek-cat-back-exhaust-audi-rs6-c7-4-0-tfsi-biturbo-quattro-13-18\"\u003eMilltek Cat-back Exhaust Audi RS6 C7 4.0 TFSI biturbo Quattro 13-18\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the Audi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the Audi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition 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\u003eYes. Milltek notes: \"Larger-bore 76mm Downpipes with cat bypass pipes for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the Milltek Sport cat-back system and requires a stage 2 ECU remap. (lambda cables need extending)\". 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":"Fits Milltek Cat Back Only","offer_id":56392745648513,"sku":"MIL-SSXAU555","price":1665.95,"currency_code":"GBP","in_stock":true},{"title":"Fits OE System Only","offer_id":56392745681281,"sku":"MIL-SSXAU634","price":1650.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU555_1.jpg?v=1791891608"},{"product_id":"milltek-sports-cat-downpipes-audi-s6-4-0-tfsi-c7-quattro-12-18","title":"Milltek Sports Cat Downpipes Audi S6 4.0 TFSI C7 Quattro 12-18","description":"\u003ch2\u003eMilltek Downpipes \u0026amp; Sports Cats for Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (2013-2018) – Improved Flow, Sports Catalyst\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's large-bore downpipe with hi-flow sports cat for the Audi S6 4.0 TFSI C7 quattro. It replaces the restrictive factory downpipe with a larger-bore pipe fitted with a high-flow sports catalyst in place of the standard unit, using a less dense substrate that flows significantly better than the factory cat while still treating the exhaust gases passing through it. It's offered in versions to suit the factory or a Milltek system, so you can pick the setup that suits how the car's used.\u003c\/p\u003e\n\u003cp\u003eIt sits between a stock downpipe and a full de-cat: a genuine flow gain suited to a Stage 1 or Stage 2 remap, without giving up the catalyst entirely the way a de-cat pipe does.\u003c\/p\u003e\n\u003cp\u003eIn the UK, a replacement catalyst on a car first registered from 1 March 2001 needs ECE R103 type-approval to be road legal, so check the EC Approved line in the specification for the version you choose.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e Large Bore Downpipes and Hi-Flow Sports Cats\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\u003eHigh-flow sports catalyst flows better than the dense factory unit while still treating exhaust gases\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 RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition (2013-2018)\u003c\/li\u003e\n\u003cli\u003eAudi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition (2013-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S6 4.0 TFSI C7 quattro (2012-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S7 Sportback 4.0 TFSI quattro S tronic (2012-2018)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e any model, engine or body style not listed above. Check your car before ordering.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eSome versions: Larger-bore 76mm Downpipes with 100-cell hi-flow sports catalysts for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the Milltek Sport cat-back system and requires a stage 2 ECU remap. (lambda cables need extending). Some versions: Larger-bore 76mm Downpipes with 100-cell hi-flow sports catalysts for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the OE cat-back system and requires a stage 2 ECU remap. (lambda cables need extending). 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-rs6-c7-4-0-tfsi-biturbo-quattro-13-18\"\u003eMilltek Active Valve Control Audi RS6 C7 4.0 TFSI biturbo Quattro 13-18\u003c\/a\u003e, \u003ca href=\"\/products\/milltek-cat-back-exhaust-audi-rs6-c7-4-0-tfsi-biturbo-quattro-13-18\"\u003eMilltek Cat-back Exhaust Audi RS6 C7 4.0 TFSI biturbo Quattro 13-18\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the Audi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the Audi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition 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\u003eMilltek lists this as a race part without EC approval, so it is intended for off-road and competition use.\u003c\/p\u003e\n\u003ch3\u003eDo I need a remap?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek notes: \"Larger-bore 76mm Downpipes with 100-cell hi-flow sports catalysts for highly tuned cars. Downpipes feature ultra-durable semi-gloss black Cerakote coating. Must be fitted with the Milltek Sport cat-back system and requires a stage 2 ECU remap. (lambda cables need extending)\". 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\u003eHow is a sports cat different from a de-cat?\u003c\/h3\u003e\n\u003cp\u003eA sports cat still contains a catalyst, just a less dense one that flows better than the factory unit. A de-cat removes the catalyst completely.\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":"Fits Milltek Cat Back Only","offer_id":56392745812353,"sku":"MIL-SSXAU554","price":3493.98,"currency_code":"GBP","in_stock":true},{"title":"Fits OE System Only","offer_id":56392745845121,"sku":"MIL-SSXAU635","price":3718.53,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU554_1_527ad0ee-f370-43a5-aa4d-626200fd170d.jpg?v=1791891614"},{"product_id":"milltek-cat-back-exhaust-audi-s6-4-0-tfsi-c7-quattro-12-18","title":"Milltek Cat Back Exhaust Audi S6 4.0 TFSI C7 Quattro 12-18","description":"\u003ch2\u003eMilltek Cat-back Exhaust for Audi S6 4.0 TFSI C7 quattro (2012-2018) – Sharper Sound, Reduced Back Pressure\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's cat-back system for the Audi S6 4.0 TFSI C7 quattro. It replaces everything from the factory catalytic converter rearward with wider-bore pipework, a re-profiled mid-pipe and silencers tuned specifically for this platform, cutting back pressure and sharpening the exhaust note. The factory catalytic converter stays in place, so the car's emissions hardware is left as standard. It's offered in non-resonated or resonated versions, 4 tailpipe finishes and valved or non-valved versions, so you can pick the setup that suits how the car's used.\u003c\/p\u003e\n\u003cp\u003eIt's aimed at owners who want a noticeably different sound and a genuine, if modest, flow improvement without touching anything upstream of the cat: a straightforward bolt-on that doesn't need a remap or any other supporting mods to enjoy.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e Cat-back\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Diameter:\u003c\/strong\u003e 70mm (2.76\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip Style:\u003c\/strong\u003e Quad 100mm GT100\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRace System:\u003c\/strong\u003e No\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\u003e70mm (2.76\") pipework\u003c\/li\u003e\n\u003cli\u003eReplaces the standard exhaust from the catalytic converter back, so the factory cat is retained\u003c\/li\u003e\n\u003cli\u003eChoice of 4 tailpipe finishes: GT-100 - Polished, GT-100 Cerakote Black, GT-100 Polished, GT-100 Titanium\u003c\/li\u003e\n\u003cli\u003eEC approved versions available\u003c\/li\u003e\n\u003cli\u003eValved versions available for switchable volume\u003c\/li\u003e\n\u003cli\u003eResonated (quieter) or non-resonated (louder) versions\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 S6 4.0 TFSI C7 quattro (2012-2018)\u003c\/li\u003e\n\u003cli\u003eAudi S7 Sportback 4.0 TFSI quattro S tronic (2012-2018)\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 any model, engine or body style not listed above. Check your car before ordering.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eWe recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.\u003c\/p\u003e\n\u003ch3\u003eWhat's the difference between the resonated and non-resonated versions?\u003c\/h3\u003e\n\u003cp\u003eThe resonated version adds extra silencing for a quieter, more refined tone. The non-resonated version leaves it out, so it is louder and more aggressive.\u003c\/p\u003e\n\u003ch3\u003eShould I choose the valved or non-valved version?\u003c\/h3\u003e\n\u003cp\u003eThe valved version lets you switch between a quieter tone and the full exhaust note. Choose non-valved if you want the same sound all the time.\u003c\/p\u003e\n\u003ch3\u003eWhich tailpipe finishes are available?\u003c\/h3\u003e\n\u003cp\u003eYou can choose from: GT-100 - Polished, GT-100 Cerakote Black, GT-100 Polished, GT-100 Titanium. The finish is cosmetic and does not change the sound.\u003c\/p\u003e\n\u003ch3\u003eWill it fit the Audi S7 Sportback 4.0 TFSI quattro S tronic?\u003c\/h3\u003e\n\u003cp\u003eYes. Milltek lists this part for the Audi S7 Sportback 4.0 TFSI quattro S tronic 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\u003eSome versions are EC approved; check the EC Approved line in the specification for the option you choose.\u003c\/p\u003e\n\u003ch3\u003eDo I need a remap?\u003c\/h3\u003e\n\u003cp\u003eNo. It fits behind the factory catalytic converter, so no software changes are needed.\u003c\/p\u003e\n\u003ch3\u003eDoes it keep the factory catalytic converter?\u003c\/h3\u003e\n\u003cp\u003eYes. It fits behind the factory catalytic converter, which stays in place.\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":"Non-Resonated \/ GT-100 - Polished \/ Non-Valved","offer_id":56392745877889,"sku":"MIL-SSXAU331","price":2093.73,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ GT-100 Cerakote Black \/ Non-Valved","offer_id":56392745910657,"sku":"MIL-SSXAU737","price":2093.68,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ GT-100 Cerakote Black \/ Valved","offer_id":56392745943425,"sku":"MIL-SSXAU448","price":2764.11,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ GT-100 Polished \/ Valved","offer_id":56392745976193,"sku":"MIL-SSXAU443","price":2764.16,"currency_code":"GBP","in_stock":true},{"title":"Non-Resonated \/ GT-100 Titanium \/ Valved","offer_id":56392746008961,"sku":"MIL-SSXAU445","price":3070.4,"currency_code":"GBP","in_stock":true},{"title":"Resonated \/ GT-100 Cerakote Black \/ Non-Valved","offer_id":56392746041729,"sku":"MIL-SSXAU560","price":2278.48,"currency_code":"GBP","in_stock":true},{"title":"Resonated \/ GT-100 Cerakote Black \/ Valved","offer_id":56392746074497,"sku":"MIL-SSXAU447","price":2948.9,"currency_code":"GBP","in_stock":true},{"title":"Resonated \/ GT-100 Polished \/ Non-Valved","offer_id":56392746107265,"sku":"MIL-SSXAU332","price":2278.53,"currency_code":"GBP","in_stock":true},{"title":"Resonated \/ GT-100 Polished \/ Valved","offer_id":56392746140033,"sku":"MIL-SSXAU444","price":2948.96,"currency_code":"GBP","in_stock":true},{"title":"Resonated \/ GT-100 Titanium \/ Non-Valved","offer_id":56392746172801,"sku":"MIL-SSXAU561","price":2584.77,"currency_code":"GBP","in_stock":true},{"title":"Resonated \/ GT-100 Titanium \/ Valved","offer_id":56392746205569,"sku":"MIL-SSXAU446","price":3255.21,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU331_1_4ecb9d6e-cc78-4b24-aa1c-b464bd7a79a6.jpg?v=1791891633"},{"product_id":"milltek-cat-back-exhaust-audi-s6-5-2-v10-c6-fsi-quattro-06-12","title":"Milltek Cat Back Exhaust Audi S6 5.2 V10 C6 FSI Quattro 06-12","description":"\u003ch2\u003eMilltek Cat-back Exhaust for Audi S6 5.2 V10 C6 FSI quattro (2006-2012) – Sharper Sound, Reduced Back Pressure\u003c\/h2\u003e\n\u003cp\u003eThis is Milltek's cat-back system for the Audi S6 5.2 V10 C6 FSI quattro. It replaces everything from the factory catalytic converter rearward with wider-bore pipework, a re-profiled mid-pipe and silencers tuned specifically for this platform, cutting back pressure and sharpening the exhaust note. The factory catalytic converter stays in place, so the car's emissions hardware is left as standard. It's offered in resonated EC approved or road+ part resonated versions, so you can pick the setup that suits how the car's used.\u003c\/p\u003e\n\u003cp\u003eIt's aimed at owners who want a noticeably different sound and a genuine, if modest, flow improvement without touching anything upstream of the cat: a straightforward bolt-on that doesn't need a remap or any other supporting mods to enjoy.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type:\u003c\/strong\u003e Cat-back\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Diameter:\u003c\/strong\u003e 60mm (2.36\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip Style:\u003c\/strong\u003e Twin 80mm Jet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRace System:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting Time:\u003c\/strong\u003e approx. 2 to 3 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\u003e60mm (2.36\") pipework\u003c\/li\u003e\n\u003cli\u003eReplaces the standard exhaust from the catalytic converter back, so the factory cat is retained\u003c\/li\u003e\n\u003cli\u003eEC approved versions available\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\u003eAudi S6 5.2 V10 C6 FSI quattro (2006-2012)\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e any model, engine or body style not listed above. Check your car before ordering.\u003c\/p\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eMilltek quotes a fitting time of approx. 2 to 3 hours. We recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.\u003c\/p\u003e\n\u003ch3\u003eIs it road legal?\u003c\/h3\u003e\n\u003cp\u003eSome versions are EC approved; check the EC Approved line in the specification for the option you choose.\u003c\/p\u003e\n\u003ch3\u003eDo I need a remap?\u003c\/h3\u003e\n\u003cp\u003eNo. It fits behind the factory catalytic converter, so no software changes are needed.\u003c\/p\u003e\n\u003ch3\u003eDoes it keep the factory catalytic converter?\u003c\/h3\u003e\n\u003cp\u003eYes. It fits behind the factory catalytic converter, which stays in place.\u003c\/p\u003e\n\u003ch3\u003eHow long does it take to fit?\u003c\/h3\u003e\n\u003cp\u003eMilltek quotes approx. 2 to 3 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":"Resonated - EC Approved","offer_id":56392746238337,"sku":"MIL-SSXAU621","price":1676.84,"currency_code":"GBP","in_stock":true},{"title":"Road+, Part Resonated","offer_id":56392746271105,"sku":"MIL-SSXAU622","price":1471.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/files\/SSXAU621_1.jpg?v=1791891620"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0667\/3232\/7161\/collections\/audi-s6.jpg?v=1791897498","url":"https:\/\/milltekexhaustshop.com\/collections\/audi-s6-performance-exhaust-systems.oembed","provider":"Milltek Exhaust Shop","version":"1.0","type":"link"}