{"product_id":"milltek-non-resonated-cat-back-exhaust-for-audi-b9-s4-s5-polished-tips-ssxau659-ssxau659","title":"Milltek Non-Resonated Cat-Back Exhaust for Audi B9 S4 S5, Polished Tips (SSXAU659)","description":"\u003cp\u003eMilltek 2.50\" Non-Resonated Cat-Back Exhaust System for Audi B9 S4 and S5 (non-sport differential models). Direct factory fitment replacement using OEM hangers and mounting points-no modification required.\u003c\/p\u003e\n\u003cp\u003eHand-finished T304L stainless steel construction with mandrel-bent piping engineered to eliminate factory resonance chambers. Quad polished oval trim finishes. 2.50\" (63.5mm) bore diameter optimized for improved exhaust scavenging and full-throttle character without secondary silencers.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAudi S4 B9 3.0L TFSI (EA839) Saloon\/Avant, non-sport differential models, 2016 and later\u003c\/li\u003e\n\u003cli\u003eAudi S5 B9 3.0L TFSI (EA839) Sportback, non-sport differential models, 2017 and later\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCat-back fitment: replaces factory cat-back section only. Factory turbocharger and downpipe remain in use. Requires 3-point hanger installation at factory points.\u003c\/p\u003e\n\u003cp\u003e T304L hand-finished construction resists corrosion under continuous track use and daily driving alike-a material and process standard competitors reserve for premium tier systems. \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":60150596665630,"sku":"MILSSXAU659","price":3742.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/7965\/3406\/files\/SSXAU659_1.jpg?v=1791252848","url":"https:\/\/shop.signatureautohaus.com\/products\/milltek-non-resonated-cat-back-exhaust-for-audi-b9-s4-s5-polished-tips-ssxau659-ssxau659","provider":"Signature Autohaus","version":"1.0","type":"link"}