{"product_id":"valved-sport-catback-exhaust-system-for-porsche-991-1-991-2-gt3-rs","title":"Valved Sport Catback Exhaust System for Porsche 991.1\/991.2 GT3\/RS","description":"\u003ch1\u003eOAO Valved Sport Cat-Back Exhaust System for Porsche 991.1 \/ 991.2 GT3 \/ GT3 RS 4.0L Flat-Six\u003c\/h1\u003e\n\u003ch2\u003eUnleash the Motorsport Soul of the Porsche GT3\u003c\/h2\u003e\n\u003cp\u003eDesigned specifically for the Porsche 911 GT3 and GT3 RS across the 991.1 and 991.2 generations, the OAO Valved Sport Cat-Back Exhaust System is engineered to enhance the naturally aspirated 4.0L flat-six engine with improved exhaust flow, reduced restriction, and an unmistakable motorsport-inspired sound.\u003c\/p\u003e\n\u003cp\u003eDeveloped for enthusiasts who demand more from Porsche's legendary high-revving GT platform, the OAO Valved Sport Cat-Back combines precision exhaust engineering with electronically controlled valves, allowing drivers to choose between refined street cruising and an aggressive, race-inspired exhaust character.\u003c\/p\u003e\n\u003cp\u003eManufactured from premium T304 stainless steel with precision TIG welding, mandrel-bent tubing, and high-flow muffler technology, the system is built to withstand the extreme temperatures and high-RPM demands of the GT3 platform.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cp\u003e✓ Designed for Porsche 991.1 \/ 991.2 GT3 \u0026amp; GT3 RS\u003c\/p\u003e\n\u003cp\u003e✓ 4.0L Naturally Aspirated Flat-Six Engine\u003c\/p\u003e\n\u003cp\u003e✓ Valved Sport Cat-Back Exhaust System\u003c\/p\u003e\n\u003cp\u003e✓ Electronically Controlled Exhaust Valves\u003c\/p\u003e\n\u003cp\u003e✓ Premium T304 Stainless Steel Construction\u003c\/p\u003e\n\u003cp\u003e✓ High-Flow Muffler Design\u003c\/p\u003e\n\u003cp\u003e✓ Precision TIG Welded\u003c\/p\u003e\n\u003cp\u003e✓ Mandrel-Bent Tubing\u003c\/p\u003e\n\u003cp\u003e✓ Optimized Exhaust Gas Flow\u003c\/p\u003e\n\u003cp\u003e✓ Reduced Exhaust Restriction\u003c\/p\u003e\n\u003cp\u003e✓ Lightweight Performance Construction\u003c\/p\u003e\n\u003cp\u003e✓ OEM-Style Direct Bolt-On Installation\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eIntelligent Valved Exhaust Control\u003c\/h2\u003e\n\u003ch3\u003eComfort \/ Street Mode\u003c\/h3\u003e\n\u003cp\u003eWith the valves closed, the OAO system delivers a deeper yet controlled exhaust tone, making the GT3 more comfortable for everyday driving and highway cruising.\u003c\/p\u003e\n\u003cp\u003eIdeal for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDaily Driving\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHighway Cruising\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLong-Distance Touring\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eResidential Areas\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReduced Exhaust Volume\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eComfortable Street Use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe result is a refined Porsche experience without sacrificing the character of the naturally aspirated flat-six.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSport \/ Open Valve Mode\u003c\/h3\u003e\n\u003cp\u003eOpen the valves and unleash the full motorsport character of the GT3.\u003c\/p\u003e\n\u003cp\u003eExperience:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSignificantly Increased Exhaust Volume\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSharper Throttle Acoustics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRicher Flat-Six Sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAggressive Acceleration Note\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\u003cli\u003e\n\u003cp\u003eMore Pronounced Downshift Sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRace-Inspired Driving Emotion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAt high RPM, the OAO system allows the naturally aspirated 4.0L engine to deliver the raw, mechanical soundtrack that makes the GT3 so special.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePerformance-Oriented Exhaust Design\u003c\/h2\u003e\n\u003cp\u003eThe OAO Valved Sport Cat-Back is engineered to improve exhaust gas flow while maintaining excellent drivability.\u003c\/p\u003e\n\u003cp\u003ePotential benefits may include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eImproved Exhaust Gas Flow\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReduced Exhaust Backpressure\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 High-RPM Breathing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMore Immediate Engine Character\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReduced Exhaust System Weight\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eImproved Compatibility with Performance Headers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOptimized Sound When Combined with Performance Exhaust Components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eActual performance gains may vary depending on vehicle configuration and supporting modifications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eMotorsport-Inspired Engineering\u003c\/h2\u003e\n\u003cp\u003eThe Porsche GT3 was developed with motorsport DNA, and the OAO exhaust system follows the same performance philosophy.\u003c\/p\u003e\n\u003cp\u003eEngineering highlights include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-Flow Straight-Through Muffler Design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOptimized Pipe Diameter\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSmooth Exhaust Gas Transitions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrecision Valve Integration\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\u003eHigh-Temperature Resistant Construction\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\u003eFactory Mounting Compatibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEvery component is designed to balance performance, sound quality, durability, and fitment.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eThe Sound of a Naturally Aspirated GT3\u003c\/h2\u003e\n\u003cp\u003eThe Porsche GT3's naturally aspirated flat-six is defined by its linear power delivery and extraordinary high-RPM character.\u003c\/p\u003e\n\u003cp\u003eThe OAO Valved Sport Cat-Back enhances that unique personality:\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\u003eRicher Low-RPM Flat-Six Tone\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCrisp Throttle Blips\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSharper Acceleration Sound\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStronger High-RPM Crescendo\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAggressive Downshift Acoustics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMore Intense Motorsport Character\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWith the valves fully open, the exhaust note becomes significantly more emotional and immersive, allowing the driver to experience the full character of Porsche's naturally aspirated GT engine.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePremium T304 Stainless Steel Construction\u003c\/h2\u003e\n\u003cp\u003eManufactured from high-quality T304 stainless steel to withstand the demanding conditions of high-performance driving.\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\u003eLightweight Performance Construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrecision TIG Welding\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCNC-Machined Connections\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\u003ePremium Surface Finish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEach OAO exhaust system is inspected before shipment to ensure precise fitment and consistent manufacturing quality.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cp\u003eCompatible with:\u003c\/p\u003e\n\u003ch3\u003ePorsche 911 GT3 991.1\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e911 GT3 Coupe\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e4.0L Naturally Aspirated Flat-Six\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePorsche 911 GT3 RS 991.1\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e911 GT3 RS\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e4.0L Naturally Aspirated Flat-Six\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePorsche 911 GT3 991.2\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e911 GT3 Coupe\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e4.0L Naturally Aspirated Flat-Six\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePorsche 911 GT3 RS 991.2\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e911 GT3 RS\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e4.0L Naturally Aspirated Flat-Six\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eModel Years\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2014–2019\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease verify your vehicle generation, model, production year, 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 Valved Sport Cat-Back Exhaust System\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eElectronic Valve Control Module\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWireless Remote Controller\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExhaust Installation Hardware\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\u003eDesigned as a direct bolt-on replacement using factory mounting locations.\u003c\/p\u003e\n\u003cp\u003eNo permanent cutting or welding is required.\u003c\/p\u003e\n\u003cp\u003eProfessional installation is highly recommended to ensure proper alignment, sealing, and valve operation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eOptional Performance Upgrades\u003c\/h2\u003e\n\u003cp\u003eThe OAO Valved Sport Cat-Back can be paired with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOAO Performance Headers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOAO High-Flow Exhaust Components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerformance ECU Calibration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLightweight Exhaust Components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCarbon Fiber Exhaust Tips\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTitanium Exhaust Tips\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum exhaust flow and sound performance, a complete OAO exhaust setup can be configured according to the vehicle's intended use.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cp\u003eThis product is intended for performance, off-road, or motorsport applications where permitted by local regulations.\u003c\/p\u003e\n\u003cp\u003ePlease verify local emissions and noise regulations before purchasing or installing this product.\u003c\/p\u003e\n\u003cp\u003eVehicle compatibility may vary depending on model year, factory exhaust configuration, and regional specification.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Choose OAO Performance\u003c\/h2\u003e\n\u003cp\u003eOAO Performance specializes in premium exhaust systems for Porsche, Ferrari, Lamborghini, McLaren, Aston Martin, BMW M, Mercedes-AMG, Audi RS, Nissan GT-R, Chevrolet Corvette, and other high-performance vehicles.\u003c\/p\u003e\n\u003cp\u003eEvery OAO exhaust system combines precision engineering, premium materials, advanced valve technology, and rigorous quality control to deliver exceptional fitment, durability, and sound.\u003c\/p\u003e\n\u003cp\u003eUpgrade your Porsche 991.1 or 991.2 GT3 \/ GT3 RS with the OAO Valved Sport Cat-Back Exhaust System and experience a sharper, louder, and more emotional version of Porsche's legendary naturally aspirated 4.0L 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