{"product_id":"milltek-resonated-cat-back-exhaust-for-audi-b9-s4-s5-polished-tips-ssxau694-ssxau694","title":"Milltek Resonated Cat-Back Exhaust for Audi B9 S4 S5, Polished Tips (SSXAU694)","description":"\u003cp\u003eMilltek 2.50\" resonated cat-back exhaust system for Audi B9 S4 and S5 3.0 V6 Turbo. Direct factory fitment for sport differential models without brace bars (2016+ S4 sedan\/Avant, 2017+ S5 Sportback). Quad GT-100 polished tips. T304L stainless steel construction, mandrel-bent throughout.\u003c\/p\u003e\n\u003cp\u003eThe resonated design delivers an engineered tone that enhances the OE+ character while maintaining composure at cruise. 2.50\" (63.50mm) diameter pipe optimizes exhaust scavenging for the 3.0 turbo's airflow requirements. Hand-finished welds and CNC-formed flanges ensure OEM-quality fitment. Uses factory hangers and mounting points-no modification required.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudi S4 B9 3.0 V6 Turbo - Saloon and Avant (sport differential, no brace bars) - 2016+\u003c\/li\u003e\n\u003cli\u003eAudi S5 B9 Sportback 3.0 V6 Turbo (sport differential, no brace bars) - 2017+\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e Resonated cat-back systems preserve rear valence fitment and maintain OE compatibility. T304L stainless steel resists thermal cycling and road salt for proven longevity. \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":60150601580830,"sku":"MILSSXAU694","price":3752.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/7965\/3406\/files\/SSXAU694_1.jpg?v=1791253085","url":"https:\/\/shop.signatureautohaus.com\/products\/milltek-resonated-cat-back-exhaust-for-audi-b9-s4-s5-polished-tips-ssxau694-ssxau694","provider":"Signature Autohaus","version":"1.0","type":"link"}