{"title":"Audi A4\/S4 Manual Collection","description":null,"products":[{"product_id":"catted-stainless-exhaust-downpipe-c-for-audi-s4-s5-b9-3-0t","title":"Free Flow Stainless Exhaust Downpipe for Audi S4 S5 B9 3.0T","description":"\u003cp data-start=\"259\" data-end=\"542\"\u003eUnlock improved performance and responsiveness from your \u003cstrong data-start=\"316\" data-end=\"336\"\u003eAudi S4 or S5 B9\u003c\/strong\u003e with the \u003cstrong data-start=\"346\" data-end=\"403\"\u003eSTRATEC Performance Exhaust Downpipe with Heat Shield\u003c\/strong\u003e. Designed to improve exhaust flow and reduce backpressure, this upgrade enhances turbo response, power delivery, and overall driving feel.\u003c\/p\u003e\n\u003cp data-start=\"544\" data-end=\"858\"\u003eConstructed from \u003cstrong data-start=\"561\" data-end=\"587\"\u003ehigh-quality materials\u003c\/strong\u003e and featuring an \u003cstrong data-start=\"605\" data-end=\"631\"\u003eintegrated heat shield\u003c\/strong\u003e, this downpipe helps manage engine bay temperatures while protecting surrounding components from excessive heat. The result is improved reliability, efficiency, and performance under both daily driving and spirited conditions.\u003c\/p\u003e\n\u003ch3 data-start=\"860\" data-end=\"876\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"877\" data-end=\"1233\"\u003e\n\u003cli data-start=\"877\" data-end=\"905\"\u003e\n\u003cp data-start=\"879\" data-end=\"905\"\u003eFits \u003cstrong data-start=\"884\" data-end=\"903\"\u003eAudi S4 \/ S5 B9\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"906\" data-end=\"945\"\u003e\n\u003cp data-start=\"908\" data-end=\"945\"\u003ePerformance exhaust downpipe design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"946\" data-end=\"996\"\u003e\n\u003cp data-start=\"948\" data-end=\"996\"\u003eImproves exhaust flow and reduces backpressure\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"997\" data-end=\"1043\"\u003e\n\u003cp data-start=\"999\" data-end=\"1043\"\u003eEnhances turbo spool and throttle response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1044\" data-end=\"1083\"\u003e\n\u003cp data-start=\"1046\" data-end=\"1083\"\u003eIncreases \u003cstrong data-start=\"1056\" data-end=\"1081\"\u003ehorsepower and torque\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1084\" data-end=\"1137\"\u003e\n\u003cp data-start=\"1086\" data-end=\"1137\"\u003e\u003cstrong data-start=\"1086\" data-end=\"1112\"\u003eIntegrated heat shield\u003c\/strong\u003e for thermal protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1138\" data-end=\"1189\"\u003e\n\u003cp data-start=\"1140\" data-end=\"1189\"\u003eDurable construction for high-heat applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1190\" data-end=\"1233\"\u003e\n\u003cp data-start=\"1192\" data-end=\"1233\"\u003ePrecision-engineered for proper fitment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1235\" data-end=\"1247\"\u003eBenefits\u003c\/h3\u003e\n\u003cul data-start=\"1248\" data-end=\"1401\"\u003e\n\u003cli data-start=\"1248\" data-end=\"1302\"\u003e\n\u003cp data-start=\"1250\" data-end=\"1302\"\u003eFaster acceleration and improved engine efficiency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1303\" data-end=\"1343\"\u003e\n\u003cp data-start=\"1305\" data-end=\"1343\"\u003eMore aggressive, deeper exhaust tone\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1344\" data-end=\"1401\"\u003e\n\u003cp data-start=\"1346\" data-end=\"1401\"\u003eImproved performance, especially in higher RPM ranges\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1403\" data-end=\"1412\"\u003eNotes\u003c\/h3\u003e\n\u003cul data-start=\"1413\" data-end=\"1559\"\u003e\n\u003cli data-start=\"1413\" data-end=\"1454\"\u003e\n\u003cp data-start=\"1415\" data-end=\"1454\"\u003eProfessional installation recommended\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1455\" data-end=\"1509\"\u003e\n\u003cp data-start=\"1457\" data-end=\"1509\"\u003eECU tuning may be required for optimal performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1510\" data-end=\"1559\"\u003e\n\u003cp data-start=\"1512\" data-end=\"1559\"\u003eIntended for performance-focused applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Stratec Systems","offers":[{"title":"Default Title","offer_id":51785442427168,"sku":"720595378635","price":749.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1085\/6992\/files\/S4DOWNPIPEEE_fa77534d-6580-49bf-929b-0253e472524a.jpg?v=1780682878"},{"product_id":"catted-stainless-exhaust-downpipe-for-audi-s4-s5-b9-3-0t","title":"Catted Stainless Exhaust Downpipe for Audi S4 S5 B9 3.0T","description":"\u003cp data-start=\"191\" data-end=\"509\"\u003eUpgrade exhaust flow, throttle response, and sound on your \u003cstrong data-start=\"250\" data-end=\"275\"\u003eAudi S4 or S5 B9 3.0T\u003c\/strong\u003e with the \u003cstrong data-start=\"285\" data-end=\"330\"\u003eSTRATEC Catted Stainless Exhaust Downpipe\u003c\/strong\u003e. Designed to reduce backpressure while retaining drivability, this downpipe delivers improved performance and a deeper, more aggressive exhaust tone compared to the factory unit.\u003c\/p\u003e\n\u003cp data-start=\"511\" data-end=\"722\"\u003eConstructed from \u003cstrong data-start=\"528\" data-end=\"560\"\u003ehigh-quality stainless steel\u003c\/strong\u003e, the downpipe features a \u003cstrong data-start=\"586\" data-end=\"619\"\u003ehigh-flow catalytic converter\u003c\/strong\u003e, offering a balanced upgrade for enthusiasts seeking stronger performance without excessive harshness.\u003c\/p\u003e\n\u003ch3 data-start=\"724\" data-end=\"740\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"741\" data-end=\"1035\"\u003e\n\u003cli data-start=\"741\" data-end=\"774\"\u003e\n\u003cp data-start=\"743\" data-end=\"774\"\u003eFits \u003cstrong data-start=\"748\" data-end=\"772\"\u003eAudi S4 \u0026amp; S5 B9 3.0T\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"775\" data-end=\"815\"\u003e\n\u003cp data-start=\"777\" data-end=\"815\"\u003e\u003cstrong data-start=\"777\" data-end=\"806\"\u003eHigh-flow catted downpipe\u003c\/strong\u003e design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"816\" data-end=\"887\"\u003e\n\u003cp data-start=\"818\" data-end=\"887\"\u003e\u003cstrong data-start=\"818\" data-end=\"850\"\u003eStainless steel construction\u003c\/strong\u003e for durability and heat resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"888\" data-end=\"938\"\u003e\n\u003cp data-start=\"890\" data-end=\"938\"\u003eReduces backpressure and improves exhaust flow\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"939\" data-end=\"990\"\u003e\n\u003cp data-start=\"941\" data-end=\"990\"\u003eEnhances turbo response, horsepower, and torque\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"991\" data-end=\"1035\"\u003e\n\u003cp data-start=\"993\" data-end=\"1035\"\u003eProduces a deeper, sportier exhaust tone\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1037\" data-end=\"1046\"\u003eNotes\u003c\/h3\u003e\n\u003cul data-start=\"1047\" data-end=\"1193\"\u003e\n\u003cli data-start=\"1047\" data-end=\"1088\"\u003e\n\u003cp data-start=\"1049\" data-end=\"1088\"\u003eProfessional installation recommended\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1089\" data-end=\"1143\"\u003e\n\u003cp data-start=\"1091\" data-end=\"1143\"\u003eECU tuning may be required for optimal performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1144\" data-end=\"1193\"\u003e\n\u003cp data-start=\"1146\" data-end=\"1193\"\u003eDesigned for performance-focused applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Stratec Systems","offers":[{"title":"Default Title","offer_id":51785442459936,"sku":"721814382457","price":999.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1085\/6992\/files\/S5-DOWN.jpg?v=1780682879"},{"product_id":"free-flow-304-stainless-exhaust-downpipe-for-audi-s4-s5-b8","title":"Free Flow 304 Stainless Exhaust Downpipe for Audi S4 S5 B8","description":"\u003cp data-start=\"212\" data-end=\"516\"\u003eImprove exhaust flow, throttle response, and overall performance on your \u003cstrong data-start=\"285\" data-end=\"310\"\u003eAudi S4 or S5 B8 3.0T\u003c\/strong\u003e with the \u003cstrong data-start=\"320\" data-end=\"358\"\u003eSTRATEC Free-Flow Exhaust Downpipe\u003c\/strong\u003e. Designed to reduce exhaust restriction, this downpipe helps unlock stronger power delivery and a more aggressive exhaust tone compared to the factory setup.\u003c\/p\u003e\n\u003cp data-start=\"518\" data-end=\"739\"\u003eConstructed from \u003cstrong data-start=\"535\" data-end=\"571\"\u003ehigh-quality 304 stainless steel\u003c\/strong\u003e, the downpipe offers excellent heat resistance, durability, and long-term corrosion protection, making it suitable for both daily driving and performance applications.\u003c\/p\u003e\n\u003ch3 data-start=\"741\" data-end=\"757\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"758\" data-end=\"1077\"\u003e\n\u003cli data-start=\"758\" data-end=\"791\"\u003e\n\u003cp data-start=\"760\" data-end=\"791\"\u003eFits \u003cstrong data-start=\"765\" data-end=\"789\"\u003eAudi S4 \u0026amp; S5 B8 3.0T\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"792\" data-end=\"857\"\u003e\n\u003cp data-start=\"794\" data-end=\"857\"\u003e\u003cstrong data-start=\"794\" data-end=\"823\"\u003eFree-flow downpipe design\u003c\/strong\u003e for improved exhaust efficiency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"858\" data-end=\"931\"\u003e\n\u003cp data-start=\"860\" data-end=\"931\"\u003e\u003cstrong data-start=\"860\" data-end=\"896\"\u003e304 stainless steel construction\u003c\/strong\u003e for strength and heat resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"932\" data-end=\"987\"\u003e\n\u003cp data-start=\"934\" data-end=\"987\"\u003eReduces backpressure and improves throttle response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"988\" data-end=\"1038\"\u003e\n\u003cp data-start=\"990\" data-end=\"1038\"\u003eEnhances horsepower, torque, and exhaust sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1039\" data-end=\"1077\"\u003e\n\u003cp data-start=\"1041\" data-end=\"1077\"\u003eDirect bolt-on performance upgrade\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1079\" data-end=\"1088\"\u003eNotes\u003c\/h3\u003e\n\u003cul data-start=\"1089\" data-end=\"1235\"\u003e\n\u003cli data-start=\"1089\" data-end=\"1130\"\u003e\n\u003cp data-start=\"1091\" data-end=\"1130\"\u003eProfessional installation recommended\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1131\" data-end=\"1185\"\u003e\n\u003cp data-start=\"1133\" data-end=\"1185\"\u003eECU tuning may be required for optimal performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1186\" data-end=\"1235\"\u003e\n\u003cp data-start=\"1188\" data-end=\"1235\"\u003eDesigned for performance-focused applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Stratec Systems","offers":[{"title":"Default Title","offer_id":51785475359008,"sku":"721814382464","price":999.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1085\/6992\/files\/exhaustdown.jpg?v=1780683094"},{"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":"Stratec Systems","offers":[{"title":"Default Title","offer_id":51831824089376,"sku":"721814382433","price":1899.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1085\/6992\/files\/304B8_107ef278-f813-42f9-91cf-a7487878a484.jpg?v=1780752070"},{"product_id":"stainless-valved-catback-exhaust-system-for-audi-b9-s4-s5","title":"Stainless Valved Catback Exhaust System for Audi B9 S4 S5","description":"\u003cp data-start=\"323\" data-end=\"646\"\u003eThe \u003cstrong data-start=\"327\" data-end=\"348\"\u003eAudi B9 S4 and S5\u003c\/strong\u003e, powered by the \u003cstrong data-start=\"365\" data-end=\"382\"\u003eEA839 3.0L V6\u003c\/strong\u003e, offer strong performance from the factory—but the stock exhaust limits the engine’s true sound and character. The \u003cstrong data-start=\"498\" data-end=\"531\"\u003eSTRATEC Valved Exhaust System\u003c\/strong\u003e unlocks a more aggressive, performance-driven exhaust tone while retaining refined, OEM-like manners when desired.\u003c\/p\u003e\n\u003cp data-start=\"648\" data-end=\"919\"\u003eEngineered as a \u003cstrong data-start=\"664\" data-end=\"702\"\u003ecomplete, one-piece exhaust system\u003c\/strong\u003e, this setup runs from the \u003cstrong data-start=\"729\" data-end=\"772\"\u003edownpipe connection to the exhaust tips\u003c\/strong\u003e, eliminating the need to mix components from multiple suppliers. The result is consistent sound quality, proper fitment, and seamless performance.\u003c\/p\u003e\n\u003cp data-start=\"921\" data-end=\"1173\"\u003eWith valves open, expect a bold, motorsport-inspired exhaust note with pronounced overrun crackles. With valves closed, the system returns to a quiet, refined tone suitable for daily driving—without unwanted drone when paired with the factory downpipe.\u003c\/p\u003e\n\u003chr data-start=\"1175\" data-end=\"1178\"\u003e\n\u003ch3 data-start=\"1180\" data-end=\"1196\"\u003eWhy It Works\u003c\/h3\u003e\n\u003cul data-start=\"1197\" data-end=\"1450\"\u003e\n\u003cli data-start=\"1197\" data-end=\"1269\"\u003e\n\u003cp data-start=\"1199\" data-end=\"1269\"\u003e\u003cstrong data-start=\"1199\" data-end=\"1229\"\u003eComplete One-Piece System:\u003c\/strong\u003e No mixing of axle-backs or resonators\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1270\" data-end=\"1357\"\u003e\n\u003cp data-start=\"1272\" data-end=\"1357\"\u003e\u003cstrong data-start=\"1272\" data-end=\"1301\"\u003eElectronic Valve Control:\u003c\/strong\u003e Instantly switch between aggressive and refined sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1358\" data-end=\"1450\"\u003e\n\u003cp data-start=\"1360\" data-end=\"1450\"\u003e\u003cstrong data-start=\"1360\" data-end=\"1384\"\u003eMandrel-Bent Design:\u003c\/strong\u003e Optimized exhaust flow for improved throttle response and power\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1452\" data-end=\"1455\"\u003e\n\u003ch3 data-start=\"1457\" data-end=\"1476\"\u003eSound \u0026amp; Control\u003c\/h3\u003e\n\u003cul data-start=\"1477\" data-end=\"1685\"\u003e\n\u003cli data-start=\"1477\" data-end=\"1561\"\u003e\n\u003cp data-start=\"1479\" data-end=\"1561\"\u003e\u003cstrong data-start=\"1479\" data-end=\"1495\"\u003eValves Open:\u003c\/strong\u003e Aggressive tone with strong midrange and sharp overrun crackles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1562\" data-end=\"1631\"\u003e\n\u003cp data-start=\"1564\" data-end=\"1631\"\u003e\u003cstrong data-start=\"1564\" data-end=\"1582\"\u003eValves Closed:\u003c\/strong\u003e Quiet, refined, and OEM-like for daily driving\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1632\" data-end=\"1685\"\u003e\n\u003cp data-start=\"1634\" data-end=\"1685\"\u003e\u003cstrong data-start=\"1634\" data-end=\"1647\"\u003eNo Drone:\u003c\/strong\u003e When used with the factory downpipe\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1687\" data-end=\"1690\"\u003e\n\u003ch3 data-start=\"1692\" data-end=\"1718\"\u003eConstruction \u0026amp; Details\u003c\/h3\u003e\n\u003cul data-start=\"1719\" data-end=\"2008\"\u003e\n\u003cli data-start=\"1719\" data-end=\"1779\"\u003e\n\u003cp data-start=\"1721\" data-end=\"1779\"\u003e\u003cstrong data-start=\"1721\" data-end=\"1734\"\u003eMaterial:\u003c\/strong\u003e Full \u003cstrong data-start=\"1740\" data-end=\"1764\"\u003eT304 stainless steel\u003c\/strong\u003e construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1780\" data-end=\"1853\"\u003e\n\u003cp data-start=\"1782\" data-end=\"1853\"\u003e\u003cstrong data-start=\"1782\" data-end=\"1801\"\u003eWeight Savings:\u003c\/strong\u003e Approx. \u003cstrong data-start=\"1810\" data-end=\"1830\"\u003e16.4 lbs lighter\u003c\/strong\u003e than factory exhaust\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1854\" data-end=\"1923\"\u003e\n\u003cp data-start=\"1856\" data-end=\"1923\"\u003e\u003cstrong data-start=\"1856\" data-end=\"1874\"\u003eCraftsmanship:\u003c\/strong\u003e Precision TIG welding and smooth mandrel bends\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1924\" data-end=\"2008\"\u003e\n\u003cp data-start=\"1926\" data-end=\"2008\"\u003e\u003cstrong data-start=\"1926\" data-end=\"1943\"\u003eExhaust Tips:\u003c\/strong\u003e Includes premium tips for a clean, performance-oriented finish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2010\" data-end=\"2013\"\u003e\n\u003ch3 data-start=\"2015\" data-end=\"2034\"\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cul data-start=\"2035\" data-end=\"2096\"\u003e\n\u003cli data-start=\"2035\" data-end=\"2065\"\u003e\n\u003cp data-start=\"2037\" data-end=\"2065\"\u003e\u003cstrong data-start=\"2037\" data-end=\"2063\"\u003e2017–2024 Audi S4 (B9)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2066\" data-end=\"2096\"\u003e\n\u003cp data-start=\"2068\" data-end=\"2096\"\u003e\u003cstrong data-start=\"2068\" data-end=\"2094\"\u003e2018–2024 Audi S5 (B9)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Stratec Systems","offers":[{"title":"Default Title","offer_id":51831824056608,"sku":"721814382440","price":1999.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1085\/6992\/files\/304BLACK_6ebcf044-bce1-4885-9209-beaf0c2be076.jpg?v=1780752073"},{"product_id":"titanium-valved-catback-exhaust-system-for-audi-b9-s4-s5","title":"Titanium Valved Catback Exhaust System for Audi B9 S4 S5","description":"\u003cp data-start=\"305\" data-end=\"704\"\u003eTake your \u003cstrong data-start=\"315\" data-end=\"335\"\u003eAudi B9 S4 or S5\u003c\/strong\u003e to the next level with the \u003cstrong data-start=\"363\" data-end=\"417\"\u003eSTRATEC Ultra-Light Titanium Valved Exhaust System\u003c\/strong\u003e, engineered for maximum weight reduction, performance, and sound control. Built for enthusiasts who demand the lightest possible setup without compromising durability, this system delivers a sharp, aggressive exhaust note when valves are open and refined, OEM-like behavior when closed.\u003c\/p\u003e\n\u003cp data-start=\"706\" data-end=\"954\"\u003eDesigned as a \u003cstrong data-start=\"720\" data-end=\"749\"\u003ecomplete one-piece system\u003c\/strong\u003e from the downpipe connection to the exhaust tips, this exhaust eliminates the need to mix components from different suppliers, ensuring consistent sound quality, perfect fitment, and seamless performance.\u003c\/p\u003e\n\u003cp data-start=\"956\" data-end=\"1180\"\u003eWith valves open, expect a crisp, motorsport-inspired tone with pronounced overrun crackles. With valves closed, the system remains quiet and comfortable for daily driving—without drone when paired with the factory downpipe.\u003c\/p\u003e\n\u003chr data-start=\"1182\" data-end=\"1185\"\u003e\n\u003ch3 data-start=\"1187\" data-end=\"1203\"\u003eWhy It Works\u003c\/h3\u003e\n\u003cul data-start=\"1204\" data-end=\"1530\"\u003e\n\u003cli data-start=\"1204\" data-end=\"1294\"\u003e\n\u003cp data-start=\"1206\" data-end=\"1294\"\u003e\u003cstrong data-start=\"1206\" data-end=\"1244\"\u003eUltra-Light Titanium Construction:\u003c\/strong\u003e Significant weight savings over stainless steel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1295\" data-end=\"1382\"\u003e\n\u003cp data-start=\"1297\" data-end=\"1382\"\u003e\u003cstrong data-start=\"1297\" data-end=\"1326\"\u003eElectronic Valve Control:\u003c\/strong\u003e Instantly switch between aggressive and refined sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1383\" data-end=\"1455\"\u003e\n\u003cp data-start=\"1385\" data-end=\"1455\"\u003e\u003cstrong data-start=\"1385\" data-end=\"1413\"\u003eOne-Piece System Design:\u003c\/strong\u003e No need to mix axle-backs or resonators\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1456\" data-end=\"1530\"\u003e\n\u003cp data-start=\"1458\" data-end=\"1530\"\u003e\u003cstrong data-start=\"1458\" data-end=\"1491\"\u003eMandrel-Bent Titanium Tubing:\u003c\/strong\u003e Maximizes flow and throttle response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1532\" data-end=\"1535\"\u003e\n\u003ch3 data-start=\"1537\" data-end=\"1556\"\u003eSound \u0026amp; Control\u003c\/h3\u003e\n\u003cul data-start=\"1557\" data-end=\"1737\"\u003e\n\u003cli data-start=\"1557\" data-end=\"1627\"\u003e\n\u003cp data-start=\"1559\" data-end=\"1627\"\u003e\u003cstrong data-start=\"1559\" data-end=\"1575\"\u003eValves Open:\u003c\/strong\u003e Loud, sharp, and performance-focused exhaust tone\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1628\" data-end=\"1685\"\u003e\n\u003cp data-start=\"1630\" data-end=\"1685\"\u003e\u003cstrong data-start=\"1630\" data-end=\"1648\"\u003eValves Closed:\u003c\/strong\u003e Quiet, refined, and daily-drivable\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1686\" data-end=\"1737\"\u003e\n\u003cp data-start=\"1688\" data-end=\"1737\"\u003e\u003cstrong data-start=\"1688\" data-end=\"1701\"\u003eNo Drone:\u003c\/strong\u003e When paired with the OEM downpipe\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1739\" data-end=\"1742\"\u003e\n\u003ch3 data-start=\"1744\" data-end=\"1770\"\u003eConstruction \u0026amp; Details\u003c\/h3\u003e\n\u003cul data-start=\"1771\" data-end=\"2076\"\u003e\n\u003cli data-start=\"1771\" data-end=\"1848\"\u003e\n\u003cp data-start=\"1773\" data-end=\"1848\"\u003e\u003cstrong data-start=\"1773\" data-end=\"1786\"\u003eMaterial:\u003c\/strong\u003e Full \u003cstrong data-start=\"1792\" data-end=\"1817\"\u003etitanium construction\u003c\/strong\u003e for extreme weight reduction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1849\" data-end=\"1929\"\u003e\n\u003cp data-start=\"1851\" data-end=\"1929\"\u003e\u003cstrong data-start=\"1851\" data-end=\"1870\"\u003eWeight Savings:\u003c\/strong\u003e Significantly lighter than factory and stainless systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1930\" data-end=\"1999\"\u003e\n\u003cp data-start=\"1932\" data-end=\"1999\"\u003e\u003cstrong data-start=\"1932\" data-end=\"1950\"\u003eCraftsmanship:\u003c\/strong\u003e Precision TIG welding and smooth mandrel bends\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2000\" data-end=\"2076\"\u003e\n\u003cp data-start=\"2002\" data-end=\"2076\"\u003e\u003cstrong data-start=\"2002\" data-end=\"2019\"\u003eExhaust Tips:\u003c\/strong\u003e Includes premium titanium tips for a motorsport finish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2078\" data-end=\"2081\"\u003e\n\u003ch3 data-start=\"2083\" data-end=\"2102\"\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cul data-start=\"2103\" data-end=\"2164\"\u003e\n\u003cli data-start=\"2103\" data-end=\"2133\"\u003e\n\u003cp data-start=\"2105\" data-end=\"2133\"\u003e\u003cstrong data-start=\"2105\" data-end=\"2131\"\u003e2017–2024 Audi S4 (B9)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2134\" data-end=\"2164\"\u003e\n\u003cp data-start=\"2136\" data-end=\"2164\"\u003e\u003cstrong data-start=\"2136\" data-end=\"2162\"\u003e2018–2024 Audi S5 (B9)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Stratec Systems","offers":[{"title":"Default Title","offer_id":51831816388896,"sku":"721814382426","price":2699.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/1085\/6992\/files\/B9_0a6f5ffd-528a-4426-b3ef-dd9b7241a049.jpg?v=1780752068"}],"url":"https:\/\/www.stratecsystems.com\/collections\/audi-a4-s4-manual-collection.oembed","provider":"STRATEC SYSTEMS","version":"1.0","type":"link"}