{"product_id":"milltek-resonated-cat-back-exhaust-for-audi-b9-s4-s5-cerakote-black-tips-ssxau641","title":"Milltek Resonated Cat-Back Exhaust for Audi B9 S4 S5, Cerakote Black Tips","description":"\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\u003ch3\u003eFitment\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\u003ch3\u003eVehicle fitment\u003c\/h3\u003e\n\u003cul class=\"fitment-list\"\u003e\n\u003cli\u003e2016 Audi S4 Base\u003c\/li\u003e\n\u003cli\u003e2016 Audi S4 Premium Plus\u003c\/li\u003e\n\u003cli\u003e2016 Audi S4 Prestige\u003c\/li\u003e\n\u003cli\u003e2017-2023 Audi S5 Base\u003c\/li\u003e\n\u003cli\u003e2018-2024 Audi S4 Base\u003c\/li\u003e\n\u003cli\u003e2018-2025 Audi S4 Premium Plus\u003c\/li\u003e\n\u003cli\u003e2018-2025 Audi S4 Prestige\u003c\/li\u003e\n\u003cli\u003e2018-2025 Audi S5 Premium Plus\u003c\/li\u003e\n\u003cli\u003e2018-2025 Audi S5 Prestige\u003c\/li\u003e\n\u003cli\u003e2019-2025 Audi S4 Premium\u003c\/li\u003e\n\u003cli\u003e2019-2025 Audi S5 Premium\u003c\/li\u003e\n\u003cli\u003e2026 Audi S4 Base\u003c\/li\u003e\n\u003cli\u003e2026 Audi S5 Base\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Milltek","offers":[{"title":"Default Title","offer_id":60150587556126,"sku":"MILSSXAU641","price":3752.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/7965\/3406\/files\/SSXAU641_1.jpg?v=1791252700","url":"https:\/\/shop.signatureautohaus.com\/products\/milltek-resonated-cat-back-exhaust-for-audi-b9-s4-s5-cerakote-black-tips-ssxau641","provider":"Signature Autohaus","version":"1.0","type":"link"}