{"product_id":"1997-2005-catless-turbo-3-to-2-5-downpipe-exhaust-for-97-05-audi-s4-b5-a6-allroad-c5-2-7l-k03-k04-rs6","title":"Catless Turbo 3\" to 2.5\" Downpipe Exhaust for 1997-2005 Audi S4 B5 A6 Allroad C5 2.7L K03 K04 RS6","description":"\u003cdiv class=\"xkv-product-description\"\u003e\n\n  \u003cp\u003e\n    This catless turbo downpipe set is designed for listed Audi 2.7L B5 \/ C5 V6 30V turbo applications, including compatible S4, RS4, A6 Quattro, and Allroad Quattro models. It is intended for compatible K03, K04, or RS6-style turbo setups where the listed flange and exhaust configuration match the vehicle.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Built from T304 stainless steel with mandrel-bent 3\" to 2.5\" piping, flex sections, V-band style connections, and CNC-machined flanges as listed, this downpipe set is designed as a catless race-style exhaust component. Final fitment, sound, turbo response, drivability, and performance results may vary depending on vehicle condition, turbo setup, transmission, O2 sensor configuration, installation quality, tuning, and supporting modifications.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eProduct Overview\u003c\/h3\u003e\n  \u003cp\u003e\n    This product is a catless turbo downpipe set for compatible Audi 2.7L twin-turbo applications. It is not a header set, full exhaust system, catback system, or universal pipe kit. Please verify your exact model, engine, transmission, turbo setup, flange connection, O2 sensor layout, and emissions requirements before purchase.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eKey Details\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Listed Audi B5 \/ C5 2.7L V6 30V turbo applications\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Catless Turbo Downpipe Exhaust Set\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTurbo Fitment:\u003c\/strong\u003e K03 turbo and upgraded K04 \/ RS6-style turbo setups as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTransmission:\u003c\/strong\u003e Manual transmission only as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e T304 Stainless Steel as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePipe Design:\u003c\/strong\u003e 3\" tapering to 2.5\" as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInlet \/ Outlet:\u003c\/strong\u003e 3\" inlet \/ 2.25\" outlet as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWall Thickness:\u003c\/strong\u003e 16-gauge \/ 1.5mm as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Catless downpipe configuration with flex sections as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e Hybrid inlet flange design for compatible K03 \/ K04 \/ RS6 turbo setups as listed\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Professional installation recommended\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUse Case:\u003c\/strong\u003e Off-road, racing, or closed-course use where emissions laws apply\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eFitment\u003c\/h3\u003e\n  \u003cp\u003e\n    Please use the table below to quickly confirm the main vehicle applications listed for this downpipe set. Before ordering, verify your exact model year, engine, transmission, turbo setup, flange connection, O2 sensor layout, and exhaust configuration.\n  \u003c\/p\u003e\n\n  \u003cdiv class=\"xkv-fitment-table-wrap\"\u003e\n    \u003ctable class=\"xkv-fitment-table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eVehicle Name\u003c\/th\u003e\n          \u003cth\u003eYear\u003c\/th\u003e\n          \u003cth\u003eEngine\u003c\/th\u003e\n          \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eAudi S4 B5\u003c\/td\u003e\n          \u003ctd\u003e2000–2002\u003c\/td\u003e\n          \u003ctd\u003e2.7L V6 30V Turbo\u003c\/td\u003e\n          \u003ctd\u003eManual transmission only; verify turbo setup and O2 sensor layout\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eAudi RS4 B5\u003c\/td\u003e\n          \u003ctd\u003e2002\u003c\/td\u003e\n          \u003ctd\u003e2.7L V6 30V Turbo\u003c\/td\u003e\n          \u003ctd\u003ePage-listed fitment; verify turbo setup and exhaust configuration\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eAudi A6 Quattro C5\u003c\/td\u003e\n          \u003ctd\u003e2000–2004\u003c\/td\u003e\n          \u003ctd\u003e2.7L V6 30V Turbo\u003c\/td\u003e\n          \u003ctd\u003eManual transmission only; verify turbo setup and exhaust configuration\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eAudi Allroad Quattro C5\u003c\/td\u003e\n          \u003ctd\u003e2001–2005\u003c\/td\u003e\n          \u003ctd\u003e2.7L V6 30V Turbo\u003c\/td\u003e\n          \u003ctd\u003eManual transmission only; verify turbo setup and exhaust configuration\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"xkv-fitment-note\"\u003e\n    \u003cstrong\u003eFitment Note:\u003c\/strong\u003e This table is based on the fitment information currently listed for this product. This downpipe set is for listed 2.7L B5 \/ C5 V6 30V turbo models only and is listed for manual transmissions only. Please verify your exact vehicle, transmission, K03 \/ K04 \/ RS6 turbo setup, flange connection, O2 sensor layout, and exhaust configuration before purchase.\n  \u003c\/div\u003e\n\n  \u003ch3\u003ePackage Includes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eCatless turbo downpipe components as shown\u003c\/li\u003e\n    \u003cli\u003eFlex pipe sections as listed\u003c\/li\u003e\n    \u003cli\u003eV-band clamps \/ flanges included as shown or listed\u003c\/li\u003e\n    \u003cli\u003eHardware included only if shown or listed\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\n    Please review the product photos and listing details before installation. Confirm all included components, clamps, flanges, gaskets, sensors, and hardware requirements against the received package before beginning installation.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eProfessional installation is strongly recommended.\u003c\/li\u003e\n    \u003cli\u003eTest fit all components before final tightening.\u003c\/li\u003e\n    \u003cli\u003eVerify turbo flange fitment, V-band connection, sleeve clamp connection, O2 sensor location, and exhaust alignment before installation.\u003c\/li\u003e\n    \u003cli\u003eCheck clearance around the turbocharger area, transmission, driveshaft, heat shields, subframe, underbody, and surrounding exhaust components.\u003c\/li\u003e\n    \u003cli\u003eSome vehicles or modified turbo setups may require adjustment, supporting exhaust components, or fabrication.\u003c\/li\u003e\n    \u003cli\u003eCompatible tuning or calibration may be required depending on O2 sensor configuration and emissions setup.\u003c\/li\u003e\n    \u003cli\u003eInspect all connections for exhaust leaks after installation and recheck clamps \/ fasteners after initial heat cycles where appropriate.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eBefore You Buy\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eThis product is intended for listed Audi 2.7L B5 \/ C5 V6 30V turbo applications only.\u003c\/li\u003e\n    \u003cli\u003eThis listing is for a catless turbo downpipe set, not a header set, full exhaust system, catback system, or universal pipe kit.\u003c\/li\u003e\n    \u003cli\u003eThis product is listed for manual transmission applications only.\u003c\/li\u003e\n    \u003cli\u003eThis product may alter or remove catalytic converter \/ emissions-related exhaust components depending on the vehicle setup.\u003c\/li\u003e\n    \u003cli\u003eThis product is intended for off-road, racing, or closed-course use where emissions laws apply.\u003c\/li\u003e\n    \u003cli\u003eThis product is not represented as street legal, emissions-compliant, CARB-compliant, or legal for public road use unless explicitly stated.\u003c\/li\u003e\n    \u003cli\u003ePlease verify local regulations, turbo setup, O2 sensor layout, flange connection, exhaust layout, and tuning requirements before purchase.\u003c\/li\u003e\n    \u003cli\u003ePerformance gains, turbo response, sound changes, exhaust flow changes, fitment, and drivability results are not guaranteed and may vary by setup.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n\u003c\/div\u003e\n\n\u003cstyle\u003e\n  .xkv-product-description {\n    font-family: Arial, sans-serif;\n    line-height: 1.5;\n    color: #333;\n  }\n\n  .xkv-product-description h3 {\n    margin-top: 28px;\n    margin-bottom: 12px;\n    color: #062E94;\n    font-size: 20px;\n    font-weight: 700;\n  }\n\n  .xkv-product-description p {\n    margin-bottom: 14px;\n  }\n\n  .xkv-product-description ul {\n    margin: 0 0 18px 20px;\n    padding: 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