{"product_id":"velocity-exhausts-porsche-991-gt3-gt3rs-exhaust-system","title":"Velocity Exhausts Porsche 991 GT3 \/ GT3RS Exhaust System","description":"\u003ch2\u003ePorsche 991 GT3 \/ GT3RS Exhaust System\u003c\/h2\u003e\n\u003cp\u003eBuilt for Porsche's naturally-aspirated 4.0L flat-six, this exhaust system is engineered to match the GT3 and GT3RS's motorsport DNA. The factory system already sounds great — this one removes the last of the restriction and lets the engine sing at full volume, sharpening throttle response and unlocking the raw, race-bred character these cars were built for.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePorsche 991.1 \u0026amp; 991.2 GT3 \u0026amp; GT3RS\u003c\/li\u003e\n  \u003cli\u003eDirect bolt-on system — no cutting or permanent modifications required\u003c\/li\u003e\n  \u003cli\u003ePrecision-engineered for OEM mounting points and factory alignment\u003c\/li\u003e\n  \u003cli\u003eCompatible with factory valve control system and drive modes (valved configurations)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConfiguration Options\u003c\/h3\u003e\n\u003cp\u003eBuild your system to match your goals — choose your pipe configuration, add-ons, material, and tip finish at checkout.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e F1 Catback, Race Catback, or Street Catback\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdd-On:\u003c\/strong\u003e System only, Headers, or 200 Cell Headers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve Option:\u003c\/strong\u003e Valved or non-valved (varies by configuration)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brushed T304 Stainless Steel or Grade 5 Titanium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTip Finish:\u003c\/strong\u003e Brushed, Black, Burnt, or Carbon Fiber\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSound Character\u003c\/h3\u003e\n\u003cp\u003eThe naturally-aspirated flat-six has one of the best factory notes in the industry — this system takes it to a race-car level.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eF1 \/ Race Catback Design:\u003c\/strong\u003e Sharpens the mid-to-high RPM wail and removes the factory's remaining muffled edge, exposing the flat-six's raw induction and exhaust note.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverrun Character:\u003c\/strong\u003e Sharp pops and crackles on lift-off and downshifts, most pronounced with a Headers or 200 Cell Headers upgrade.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Profile:\u003c\/strong\u003e High-revving, motorsport-pitched tone — closer to a GT3 Cup race car than a street-going 911.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaterials \u0026amp; Engineering\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAvailable in Brushed T304 stainless steel or aerospace-grade Grade 5 titanium for maximum strength-to-weight ratio\u003c\/li\u003e\n  \u003cli\u003eTitanium configuration offers significant weight reduction vs. OEM exhaust system\u003c\/li\u003e\n  \u003cli\u003eHeaders and 200 Cell Headers options for reduced backpressure and increased flow\u003c\/li\u003e\n  \u003cli\u003ePrecision TIG-welded for structural integrity and a clean, motorsport-grade finish\u003c\/li\u003e\n  \u003cli\u003eMandrel-bent tubing ensures optimal exhaust velocity and minimal restriction\u003c\/li\u003e\n  \u003cli\u003eHigh heat resistance for sustained performance under track conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerformance Benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eImproved exhaust flow for enhanced horsepower and throttle response\u003c\/li\u003e\n  \u003cli\u003eReduced system weight for sharper handling and quicker acceleration (titanium configuration)\u003c\/li\u003e\n  \u003cli\u003eHigher-RPM responsiveness suited to the GT3\/GT3RS's motorsport-derived powerband\u003c\/li\u003e\n  \u003cli\u003eEnhanced driver engagement through sharper sound and feedback, on-track and off\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFull exhaust system, built to your selected configuration\u003c\/li\u003e\n  \u003cli\u003eAll required clamps, hardware, and gaskets\u003c\/li\u003e\n  \u003cli\u003ePlug-and-play valve integration components (valved configurations)\u003c\/li\u003e\n  \u003cli\u003eInstallation guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy This System\u003c\/h3\u003e\n\u003cp\u003eThe GT3 and GT3RS were built as Porsche's most track-focused 911s — but the factory exhaust still holds back the flat-six's full voice. This system removes that ceiling, delivering the sharper, more race-bred soundtrack these cars were always meant to have.\u003c\/p\u003e\n\u003cp\u003eFor owners who want their GT3 to sound as extreme as it drives — this is the upgrade that defines it.\u003c\/p\u003e","brand":"Velocity Exhausts","offers":[{"title":"F1 Catback System Only (valved) \/ Brushed T304 Stainless Steel \/ Brushed","offer_id":48287143395577,"sku":"14:200004889#standard-4","price":3399.99,"currency_code":"USD","in_stock":true},{"title":"F1 Catback System Only (valved) \/ Brushed T304 Stainless Steel \/ Black","offer_id":48287143362809,"sku":"14:200004889#standard-3","price":3399.99,"currency_code":"USD","in_stock":true},{"title":"F1 Catback System Only (valved) \/ Brushed T304 Stainless Steel \/ Burnt","offer_id":67232645873913,"sku":null,"price":3399.99,"currency_code":"USD","in_stock":true},{"title":"F1 Catback System Only (valved) \/ Brushed T304 Stainless Steel \/ Carbon 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