{"product_id":"audi-b9-s4-s5-ea839-performance-downpipe","title":"Audi B9 S4\/S5 EA839 Performance Downpipe","description":"\u003ch1\u003eOAO High Performance Downpipes for Audi B9 S4 \/ S5 3.0T TFSI EA839 Twin-Turbo V6 T304 Stainless Steel Exhaust System\u003c\/h1\u003e\n\u003ch2\u003eUnlock the Hidden Performance of Audi's EA839 3.0T Engine\u003c\/h2\u003e\n\u003cp\u003eDesigned specifically for the Audi B9 S4 and S5 equipped with the advanced EA839 3.0L turbocharged V6 engine, the OAO High Performance Downpipes are engineered to improve exhaust flow, reduce turbocharger backpressure, and unlock the true performance potential of Audi's premium sport sedan and coupe platform.\u003c\/p\u003e\n\u003cp\u003eReplacing the restrictive factory catalytic downpipes allows exhaust gases to exit the turbocharger more efficiently, improving turbo response, enhancing throttle sensitivity, increasing engine efficiency, and delivering a deeper, more aggressive exhaust note.\u003c\/p\u003e\n\u003cp\u003eManufactured from premium T304 stainless steel with precision TIG welding, CNC-machined flanges, and mandrel-bent tubing, every OAO downpipe is designed for maximum durability, excellent heat 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 S4 \/ S5\u003c\/p\u003e\n\u003cp\u003e✓ EA839 3.0L 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 Audi B9 Downpipes?\u003c\/h2\u003e\n\u003cp\u003eThe factory catalytic downpipe is designed to meet emissions regulations and noise requirements, which limits exhaust flow directly after the turbocharger.\u003c\/p\u003e\n\u003cp\u003eThe OAO High Performance Downpipes optimize exhaust gas evacuation, allowing the EA839 3.0T V6 engine to breathe more freely and perform more efficiently.\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\u003eEnhanced 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\u003eIncreased Exhaust Flow Capacity\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 improvements may vary depending on supporting modifications and engine calibration.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eMotorsport-Inspired Engineering\u003c\/h2\u003e\n\u003cp\u003eDeveloped using advanced exhaust flow engineering and performance-focused design principles, every OAO downpipe is optimized for performance, reliability, and perfect vehicle integration.\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\u003eReduced Internal Turbulence\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\u003eImproved Heat Resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLightweight Performance Construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFactory Exhaust Compatibility\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 V6 Turbo Sound\u003c\/h2\u003e\n\u003cp\u003eThe Audi EA839 3.0T V6 engine delivers a smooth yet powerful performance 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\u003eEnhanced Overrun Sound (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\u003eMore Aggressive Sport Character\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen paired with an OAO Valvetronic Exhaust System, the B9 S4\/S5 delivers a more exciting and emotional driving 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 to provide exceptional durability and long-term reliability.\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\u003eEach OAO downpipe undergoes strict quality inspection before shipment to ensure precise fitment and premium craftsmanship.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cp\u003eCompatible with:\u003c\/p\u003e\n\u003ch3\u003eAudi S4 B9\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eS4 Sedan (B9)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eS4 Avant (B9)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAudi S5 B9\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eS5 Coupe (B9)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eS5 Sportback (B9)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eS5 Cabriolet (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 3.0L 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\u003e2017\u003c\/p\u003e\n\u003c\/li\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\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 for proper fitment and performance.\u003c\/p\u003e\n\u003cp\u003eECU calibration is recommended after installation to maximize performance and optimize engine operation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cp\u003eAvailable in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCatless Version\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-Flow Sport Catalytic Version\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\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 purchasing or installing this product.\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, 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, exceptional durability, and outstanding performance.\u003c\/p\u003e\n\u003cp\u003eUpgrade your Audi B9 S4 or S5 3.0T with the OAO High Performance Downpipes and experience faster turbo response, improved exhaust flow, and the enhanced performance character of Audi's EA839 turbocharged V6 engine.\u003c\/p\u003e","brand":"OAO-EXHAUST","offers":[{"title":"B9 S4\/S5 3.0T \/ Catless Downpipes \/ 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