{"product_id":"audi-b9-rs4-rs5-performance-downpipes","title":"Audi B9 RS4\/RS5 Performance Downpipes","description":"\u003ch1\u003eOAO High Performance Downpipes for Audi B9 RS4 \/ RS5 2.9T TFSI EA839 Twin-Turbo V6 T304 Stainless Steel Exhaust System\u003c\/h1\u003e\n\u003ch2\u003eUnlock the Full Performance Potential of Audi's 2.9T Twin-Turbo V6\u003c\/h2\u003e\n\u003cp\u003eDesigned specifically for the Audi B9 RS4 and RS5 equipped with the powerful EA839 2.9L twin-turbocharged V6 engine, the OAO High Performance Downpipes are engineered to maximize exhaust flow, reduce turbocharger backpressure, and unlock the full performance potential of Audi Sport's high-performance platform.\u003c\/p\u003e\n\u003cp\u003eReplacing the restrictive factory catalytic downpipes allows exhaust gases to exit the twin turbochargers more efficiently, improving turbo response, enhancing throttle sensitivity, increasing engine efficiency, and delivering a deeper, more aggressive RS exhaust note.\u003c\/p\u003e\n\u003cp\u003eManufactured from premium T304 stainless steel with precision TIG welding, mandrel-bent tubing, and CNC-machined flanges, every OAO downpipe is built to withstand extreme temperatures while providing exceptional durability, corrosion resistance, and OEM-quality fitment.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cp\u003e✓ Designed for Audi B9 RS4 \/ RS5\u003c\/p\u003e\n\u003cp\u003e✓ EA839 2.9L Twin-Turbocharged V6 TFSI Engine\u003c\/p\u003e\n\u003cp\u003e✓ High-Flow Performance Downpipes\u003c\/p\u003e\n\u003cp\u003e✓ Premium T304 Stainless Steel Construction\u003c\/p\u003e\n\u003cp\u003e✓ Available in Catless or High-Flow Sport Catalytic Versions\u003c\/p\u003e\n\u003cp\u003e✓ Precision TIG Welded\u003c\/p\u003e\n\u003cp\u003e✓ Mandrel-Bent Tubing Design\u003c\/p\u003e\n\u003cp\u003e✓ CNC Precision-Machined Flanges\u003c\/p\u003e\n\u003cp\u003e✓ Reduced Exhaust Backpressure\u003c\/p\u003e\n\u003cp\u003e✓ Faster Turbocharger Response\u003c\/p\u003e\n\u003cp\u003e✓ Improved Exhaust Flow Efficiency\u003c\/p\u003e\n\u003cp\u003e✓ OEM-Level Direct Bolt-On Fitment\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Upgrade Your RS Downpipes?\u003c\/h2\u003e\n\u003cp\u003eThe factory downpipes are designed to meet emissions regulations and noise requirements, limiting exhaust flow immediately after the turbochargers.\u003c\/p\u003e\n\u003cp\u003eThe OAO High Performance Downpipes optimize exhaust gas evacuation, allowing the EA839 twin-turbo V6 to breathe more efficiently while improving overall driving performance.\u003c\/p\u003e\n\u003cp\u003ePotential benefits may include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eFaster Turbo Spool\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReduced Exhaust Restriction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eImproved Turbocharger Efficiency\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSharper Throttle Response\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncreased Mid-Range Torque\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eImproved High-RPM Performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnhanced Exhaust Flow\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBetter Compatibility with ECU Performance Tuning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eActual performance gains may vary depending on supporting modifications and ECU calibration.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eMotorsport-Inspired Engineering\u003c\/h2\u003e\n\u003cp\u003eDeveloped using advanced exhaust flow analysis and performance engineering principles, every OAO downpipe is optimized for maximum efficiency and durability.\u003c\/p\u003e\n\u003cp\u003eEngineering highlights include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLarge-Diameter High-Flow Tubing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSmooth Exhaust Gas Transition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOptimized Exhaust Velocity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReduced Flow Turbulence\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eImproved Thermal Management\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLightweight Performance Design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSeamless Integration with Factory and Aftermarket Exhaust Systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDesigned for both daily driving and high-performance applications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eEnhanced Audi RS Sound\u003c\/h2\u003e\n\u003cp\u003eThe EA839 2.9T twin-turbo V6 delivers impressive power and a refined RS character.\u003c\/p\u003e\n\u003cp\u003eThe OAO Performance Downpipes enhance the natural sound of the engine:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDeeper Cold Start\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStronger Turbocharger Sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRicher V6 Exhaust Tone\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSharper Acceleration Acoustics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMore Aggressive Overrun Pops (ECU Calibration Dependent)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncreased Exhaust Volume\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEnhanced High-RPM Exhaust Character\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCombined with an OAO Valvetronic Exhaust System, the RS4 and RS5 deliver a more emotional and aggressive Audi Sport experience.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePremium T304 Stainless Steel Construction\u003c\/h2\u003e\n\u003cp\u003eManufactured from motorsport-grade T304 stainless steel for exceptional durability under extreme operating conditions.\u003c\/p\u003e\n\u003cp\u003eAdvantages include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eExcellent Corrosion Resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuperior Heat Resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh Structural Strength\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLong Service Life\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrecision CNC-Machined Flanges\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFully TIG Welded Construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery OAO downpipe is carefully inspected before shipment to ensure perfect quality and fitment.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cp\u003eCompatible with:\u003c\/p\u003e\n\u003ch3\u003eAudi RS4 B9\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRS4 Avant (B9)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAudi RS5 B9\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRS5 Coupe (B9)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRS5 Sportback (B9)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eEngine Platform\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eEA839 2.9L Twin-Turbocharged V6 TFSI\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eModel Years\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2018\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2019\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2020\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2021\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2022\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2023\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2024\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease verify your vehicle model, engine code, and factory exhaust configuration before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePackage Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOAO High Performance Downpipes (Left \u0026amp; Right)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eInstallation Hardware Kit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProtective Packaging\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation\u003c\/h2\u003e\n\u003cp\u003eDirect bolt-on installation using factory mounting locations.\u003c\/p\u003e\n\u003cp\u003eNo cutting or welding required.\u003c\/p\u003e\n\u003cp\u003eProfessional installation is highly recommended.\u003c\/p\u003e\n\u003cp\u003eECU tuning is recommended after installation to maximize performance and optimize engine calibration.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cp\u003eAvailable in \u003cstrong\u003eCatless\u003c\/strong\u003e and \u003cstrong\u003eHigh-Flow Sport Catalytic\u003c\/strong\u003e configurations.\u003c\/p\u003e\n\u003cp\u003eThis product is intended for off-road or motorsport use where permitted by local regulations.\u003c\/p\u003e\n\u003cp\u003ePlease verify local emissions requirements before purchase or installation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Choose OAO Performance\u003c\/h2\u003e\n\u003cp\u003eOAO specializes in premium exhaust systems for Audi RS, BMW M, Mercedes-AMG, Porsche, Ferrari, Lamborghini, Aston Martin, Nissan GT-R, and other world-class performance vehicles.\u003c\/p\u003e\n\u003cp\u003eEvery OAO exhaust component combines precision engineering, premium materials, and extensive vehicle testing to deliver OEM-quality fitment, outstanding durability, and exceptional performance.\u003c\/p\u003e\n\u003cp\u003eUpgrade your Audi B9 RS4 or RS5 2.9T with the OAO High Performance Downpipes and experience faster turbo response, improved exhaust flow, and the unmistakable sound of Audi Sport's twin-turbo V6 performance.\u003c\/p\u003e","brand":"OAO-EXHAUST","offers":[{"title":"Audi B9 RS4\/RS5 2.9T \/ Catless Downpipes \/ Brushed","offer_id":47262225334441,"sku":null,"price":800.0,"currency_code":"USD","in_stock":true},{"title":"Audi B9 RS4\/RS5 2.9T \/ Catless Downpipes \/ Pack 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