{"product_id":"milltek-resonated-cat-back-exhaust-for-audi-b9-s4-s5-polished-tips-ssxau648-ssxau648","title":"Milltek Resonated Cat-Back Exhaust for Audi B9 S4 S5, Polished Tips (SSXAU648)","description":"\u003cp\u003eMilltek 2.50\" Resonated Cat-Back Exhaust System for Audi B9 S4 and S5 (non-Sport Diff). Direct factory fitment using OEM hangers, no modification required. Hand-finished T304L stainless steel construction with quad polished oval trims.\u003c\/p\u003e\n\u003cp\u003eThe resonated design eliminates OE resonance points that cause cabin drone while preserving a sportier, more pronounced exhaust character at full throttle. 2.50\" (63.50mm) mandrel-bent piping maximizes flow efficiency. Dyno-tested across the B9 platform for measurable torque gains without sacrificing street composure.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudi S4 3.0 TFSI V6 B9 Saloon\/Sedan \u0026amp; Avant - 2016 and later (non-Sport Diff)\u003c\/li\u003e\n\u003cli\u003eAudi S5 3.0 TFSI V6 B9 Sportback - 2017 and later (non-Sport Diff)\u003c\/li\u003e\n\u003c\/ul\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":60150593290526,"sku":"MILSSXAU648","price":3987.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/7965\/3406\/files\/SSXAU648_1.jpg?v=1791252757","url":"https:\/\/shop.signatureautohaus.com\/products\/milltek-resonated-cat-back-exhaust-for-audi-b9-s4-s5-polished-tips-ssxau648-ssxau648","provider":"Signature Autohaus","version":"1.0","type":"link"}