{"product_id":"milltek-resonated-cat-back-exhaust-audi-b9-s4-s5-cerakote-black-tips-ssxau641","title":"Resonated Cat-Back Exhaust | Audi B9 S4 S5 - Cerakote Black Tips | Milltek","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMilltek Resonated Cat-Back Exhaust System for Audi B9 S4 and S5 (non-sport differential models). Direct factory fitment replacement using OEM hangers, no modification required. 2.50\" (63.50mm) mandrel-bent T304L stainless steel construction with Cerakote black trim.\u003c\/p\u003e\n\u003cp\u003eThe resonated design eliminates low-frequency drone while preserving full-throttle character. T304L material resists corrosion and thermal cycling. CNC-formed internals fine-tune the OE resonance point for an engineered tone that sounds purposeful without excessive cabin noise. Hand-finished to Milltek's specification.\u003c\/p\u003e\n\u003ch2\u003eDetails\u003c\/h2\u003e\n\u003ch3\u003eFitment Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudi S4 B9 3.0 Turbo V6 - Saloon\/Sedan and Avant (non-sport differential) 2016 and later\u003c\/li\u003e\n\u003cli\u003eAudi S5 B9 3.0 Turbo V6 - Sportback (non-sport differential only) 2017 and later\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e Cat-back system only - retains factory downpipe and catalytic converter. Uses OEM mounting points and suspension hangers for seamless integration. \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":68005543149870,"sku":"SSXAU641","price":3189.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/1719\/1726\/files\/SSXAU641_1.jpg?v=1794451863","url":"https:\/\/shopicwp.com\/products\/milltek-resonated-cat-back-exhaust-audi-b9-s4-s5-cerakote-black-tips-ssxau641","provider":"Inner Circle Wheels and Performance","version":"1.0","type":"link"}