{"product_id":"milltek-80mm-large-bore-downpipe-amp-hi-flow-sports-cat-audi-rs6-c8-ssxau909","title":"80mm Large Bore Downpipe \u0026 Hi-Flow Sports Cat | Audi RS6 C8 | Milltek","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Milltek 80mm Cat Back Large Bore Downpipe \u0026amp; Hi-Flow Sports Cat is a turbo-back component engineered for the Audi RS6 C8 (4.0L bi-turbo V8), Audi RS7 C8, and Audi S8 D5 (4.0L TFSI V8). This system optimizes exhaust flow downstream of the turbos and ahead of the cat-back system, unlocking measurable power gains and refined acoustic character.\u003c\/p\u003e\n\u003cp\u003eManufactured from T304L stainless steel with mandrel-bent piping (3.15\" \/ 80mm bore) and a high-flow sports catalytic converter (200 CPSI), the downpipe delivers direct factory fitment using OEM mounting points. The hi-flow cat maintains emissions compliance while reducing back pressure. Stage 2 ECU software is required to unlock full performance potential.\u003c\/p\u003e\n\u003ch2\u003eDetails\u003c\/h2\u003e\n\u003ch3\u003eFitment Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudi RS6 C8 4.0L bi-turbo V8 (Performance Edition, 2020+)\u003c\/li\u003e\n\u003cli\u003eAudi RS7 C8 4.0L bi-turbo V8 (2019+)\u003c\/li\u003e\n\u003cli\u003eAudi S8 D5 4.0L TFSI V8 Standard Wheelbase (2020+)\u003c\/li\u003e\n\u003cli\u003eAudi S8 D5 4.0L TFSI V8 Long Wheelbase (2020+)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e Requires integration with OE or Milltek cat-back exhaust system. No OEM modifications necessary. \u003c\/p\u003e\n\u003cp\u003eDesigned and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e","brand":"Milltek","offers":[{"title":"Default Title","offer_id":68005560320302,"sku":"SSXAU909","price":5513.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/1719\/1726\/files\/SSXAU909_1.jpg?v=1794452097","url":"https:\/\/shopicwp.com\/products\/milltek-80mm-large-bore-downpipe-amp-hi-flow-sports-cat-audi-rs6-c8-ssxau909","provider":"Inner Circle Wheels and Performance","version":"1.0","type":"link"}