{"product_id":"milltek-resonated-cat-back-exhaust-for-audi-b9-s4-s5-cerakote-black-tips-ssxau649-ssxau649","title":"Milltek Resonated Cat-Back Exhaust for Audi B9 S4 S5, Cerakote Black Tips (SSXAU649)","description":"\u003cp\u003eMilltek 2.50\" 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.\u003c\/p\u003e\n\u003cp\u003eHand-finished T304L stainless steel construction with mandrel-bent 2.50\" (63.50mm) bore pipe. Resonated design eliminates drone while preserving OE+ tone character. Quad Cerakote Black oval trims. Dyno-proven power gains with engineering-grade flow optimization.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudi S4 B9 3.0L Turbo V6 (Non Sport Diff) - 2016+\u003c\/li\u003e\n\u003cli\u003eAudi S5 B9 Sportback 3.0L Turbo V6 (Non Sport Diff) - 2017+\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e Cat-back system; retains factory cat and secondary catalytic converters. Engineered to Exhilarate. \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":60150593716510,"sku":"MILSSXAU649","price":4236.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/7965\/3406\/files\/SSXAU649_1.jpg?v=1791252765","url":"https:\/\/shop.signatureautohaus.com\/products\/milltek-resonated-cat-back-exhaust-for-audi-b9-s4-s5-cerakote-black-tips-ssxau649-ssxau649","provider":"Signature Autohaus","version":"1.0","type":"link"}