{"product_id":"stainless-valved-catback-exhaust-system-for-audi-b8-b8-5-s4-s5","title":"Stainless Valved Catback Exhaust System for Audi B8 B8.5 S4 S5","description":"\u003cp data-start=\"304\" data-end=\"634\"\u003eTransform the sound and driving experience of your \u003cstrong data-start=\"355\" data-end=\"380\"\u003eAudi S4 or S5 B8\/B8.5\u003c\/strong\u003e with the \u003cstrong data-start=\"390\" data-end=\"423\"\u003eSTRATEC Valved Exhaust System\u003c\/strong\u003e. Designed for the supercharged V6 platform, this system delivers a \u003cstrong data-start=\"491\" data-end=\"517\"\u003eunique high-pitch tone\u003c\/strong\u003e while retaining deep, aggressive low-end character—creating a sound profile that stands out from traditional setups.\u003c\/p\u003e\n\u003cp data-start=\"636\" data-end=\"1031\"\u003eConstructed entirely from \u003cstrong data-start=\"662\" data-end=\"686\"\u003eT304 stainless steel\u003c\/strong\u003e and featuring a \u003cstrong data-start=\"703\" data-end=\"724\"\u003ehigh-pitch X-pipe\u003c\/strong\u003e, the system runs \u003cstrong data-start=\"742\" data-end=\"780\"\u003e2.5-inch tubing from front to rear\u003c\/strong\u003e, enhancing exhaust flow and sound across the entire RPM range. Integrated \u003cstrong data-start=\"855\" data-end=\"881\"\u003evacuum-actuated valves\u003c\/strong\u003e, controlled via an included \u003cstrong data-start=\"910\" data-end=\"928\"\u003ekey fob remote\u003c\/strong\u003e, allow instant switching between refined cruising and an aggressive, motorsport-inspired exhaust note.\u003c\/p\u003e\n\u003ch3 data-start=\"1033\" data-end=\"1049\"\u003eWhy It Works\u003c\/h3\u003e\n\u003cul data-start=\"1050\" data-end=\"1326\"\u003e\n\u003cli data-start=\"1050\" data-end=\"1149\"\u003e\n\u003cp data-start=\"1052\" data-end=\"1149\"\u003e\u003cstrong data-start=\"1052\" data-end=\"1081\"\u003eHigh-Pitch X-Pipe Design:\u003c\/strong\u003e Produces a sharper, more exotic tone while improving exhaust flow\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1150\" data-end=\"1232\"\u003e\n\u003cp data-start=\"1152\" data-end=\"1232\"\u003e\u003cstrong data-start=\"1152\" data-end=\"1177\"\u003eVacuum Valve Control:\u003c\/strong\u003e On-demand sound adjustment using the included remote\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1233\" data-end=\"1326\"\u003e\n\u003cp data-start=\"1235\" data-end=\"1326\"\u003e\u003cstrong data-start=\"1235\" data-end=\"1259\"\u003eMandrel-Bent Tubing:\u003c\/strong\u003e Optimized flow for improved throttle response and power delivery\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1328\" data-end=\"1347\"\u003eSound \u0026amp; Control\u003c\/h3\u003e\n\u003cul data-start=\"1348\" data-end=\"1602\"\u003e\n\u003cli data-start=\"1348\" data-end=\"1427\"\u003e\n\u003cp data-start=\"1350\" data-end=\"1427\"\u003e\u003cstrong data-start=\"1350\" data-end=\"1368\"\u003eValves Closed:\u003c\/strong\u003e Quiet and refined for daily driving and highway cruising\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1428\" data-end=\"1529\"\u003e\n\u003cp data-start=\"1430\" data-end=\"1529\"\u003e\u003cstrong data-start=\"1430\" data-end=\"1446\"\u003eValves Open:\u003c\/strong\u003e Aggressive, high-energy exhaust tone with strong low-end and high-RPM excitement\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1530\" data-end=\"1602\"\u003e\n\u003cp data-start=\"1532\" data-end=\"1602\"\u003e\u003cstrong data-start=\"1532\" data-end=\"1551\"\u003eRemote Control:\u003c\/strong\u003e Instantly operate valves from inside the vehicle\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1604\" data-end=\"1630\"\u003eConstruction \u0026amp; Details\u003c\/h3\u003e\n\u003cul data-start=\"1631\" data-end=\"1910\"\u003e\n\u003cli data-start=\"1631\" data-end=\"1709\"\u003e\n\u003cp data-start=\"1633\" data-end=\"1709\"\u003e\u003cstrong data-start=\"1633\" data-end=\"1646\"\u003eMaterial:\u003c\/strong\u003e T304 stainless steel for durability and corrosion resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1710\" data-end=\"1783\"\u003e\n\u003cp data-start=\"1712\" data-end=\"1783\"\u003e\u003cstrong data-start=\"1712\" data-end=\"1731\"\u003eWeight Savings:\u003c\/strong\u003e Approx. \u003cstrong data-start=\"1740\" data-end=\"1760\"\u003e12.3 lbs lighter\u003c\/strong\u003e than factory exhaust\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1784\" data-end=\"1853\"\u003e\n\u003cp data-start=\"1786\" data-end=\"1853\"\u003e\u003cstrong data-start=\"1786\" data-end=\"1804\"\u003eCraftsmanship:\u003c\/strong\u003e Precision TIG welding and smooth mandrel bends\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1854\" data-end=\"1910\"\u003e\n\u003cp data-start=\"1856\" data-end=\"1910\"\u003e\u003cstrong data-start=\"1856\" data-end=\"1876\"\u003eTubing Diameter:\u003c\/strong\u003e 2.5\" from front to exhaust tips\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1912\" data-end=\"1931\"\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cul data-start=\"1932\" data-end=\"2007\"\u003e\n\u003cli data-start=\"1932\" data-end=\"1969\"\u003e\n\u003cp data-start=\"1934\" data-end=\"1969\"\u003e\u003cstrong data-start=\"1934\" data-end=\"1967\"\u003e2010–2016 Audi S4 (B8 \/ B8.5)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1970\" data-end=\"2007\"\u003e\n\u003cp data-start=\"1972\" data-end=\"2007\"\u003e\u003cstrong data-start=\"1972\" data-end=\"2005\"\u003e2010–2016 Audi S5 (B8 \/ B8.5)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bull Boost Performance","offers":[{"title":"Default Title","offer_id":53364551778611,"sku":"721814382433","price":1899.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2720\/8266\/files\/304B8.jpg?v=1779122236","url":"https:\/\/ntxglow.com\/products\/stainless-valved-catback-exhaust-system-for-audi-b8-b8-5-s4-s5","provider":"NTXGlow","version":"1.0","type":"link"}