{"product_id":"porsche-991-gt3-rs-stainless-steel-full-race-exhaust-system","title":"Porsche 991 GT3 \/ GT3RS Stainless Steel Valved Race Exhaust System","description":"\u003cp data-end=\"69\" data-start=\"0\"\u003e\u003cstrong data-end=\"69\" data-start=\"0\"\u003ePorsche 991 GT3 \/ GT3 RS T304 Stainless Steel Race Exhaust System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"400\" data-start=\"71\"\u003eBuilt for drivers who want the rawest expression of Porsche’s 9,000 RPM flat-six, this race-spec exhaust system transforms the 991 GT3 and GT3 RS into a true motorsport machine. Louder, sharper, and significantly more aggressive—this is the upgrade that removes factory limitations and delivers a pure, track-inspired experience.\u003c\/p\u003e\n\u003chr data-end=\"405\" data-start=\"402\"\u003e\n\u003ch3 data-end=\"422\" data-start=\"407\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"422\" data-start=\"411\"\u003ePricing\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"511\" data-start=\"423\"\u003e\n\u003cli data-end=\"461\" data-start=\"423\"\u003e\n\u003cstrong data-end=\"449\" data-start=\"425\"\u003eCatless Race System:\u003c\/strong\u003e $6,299.99\u003c\/li\u003e\n\u003cli data-end=\"511\" data-start=\"462\"\u003e\n\u003cstrong data-end=\"499\" data-start=\"464\"\u003eCatted Race System (High-Flow):\u003c\/strong\u003e $6,899.99\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"516\" data-start=\"513\"\u003e\n\u003ch3 data-end=\"533\" data-start=\"518\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"533\" data-start=\"522\"\u003eFitment\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"851\" data-start=\"534\"\u003e\n\u003cli data-end=\"581\" data-start=\"534\"\u003ePorsche 911 GT3 (991.1 \u0026amp; 991.2 | 2014–2019)\u003c\/li\u003e\n\u003cli data-end=\"632\" data-start=\"582\"\u003ePorsche 911 GT3 RS (991.1 \u0026amp; 991.2 | 2016–2019)\u003c\/li\u003e\n\u003cli data-end=\"713\" data-start=\"633\"\u003eDirect bolt-on installation — no cutting or permanent modifications required\u003c\/li\u003e\n\u003cli data-end=\"784\" data-start=\"714\"\u003ePrecision-engineered for OEM mounting points and perfect alignment\u003c\/li\u003e\n\u003cli data-end=\"851\" data-start=\"785\"\u003eCompatible with factory exhaust valve controls and drive modes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"856\" data-start=\"853\"\u003e\n\u003ch3 data-end=\"881\" data-start=\"858\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"881\" data-start=\"862\"\u003eSound Character\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-end=\"929\" data-start=\"882\"\u003eThis is where the GT3 becomes truly unfiltered.\u003c\/p\u003e\n\u003cul data-end=\"1757\" data-start=\"931\"\u003e\n\u003cli data-end=\"1039\" data-start=\"931\"\u003e\n\u003cstrong data-end=\"951\" data-start=\"933\"\u003eValves Closed:\u003c\/strong\u003e Noticeably deeper and more present than stock, with a controlled but purposeful tone.\u003c\/li\u003e\n\u003cli data-end=\"1244\" data-start=\"1040\"\u003e\n\u003cstrong data-end=\"1058\" data-start=\"1042\"\u003eValves Open:\u003c\/strong\u003e Full race-derived scream—extreme volume, razor-sharp pitch, and immediate response. Expect violent overrun crackles, crisp upshifts, and a relentless top-end that mirrors a track car.\u003c\/li\u003e\n\u003cli data-end=\"1429\" data-start=\"1245\"\u003e\n\u003cstrong data-end=\"1273\" data-start=\"1247\"\u003eCatless Configuration:\u003c\/strong\u003e Maximum intensity and rawness. Unrestricted flow delivers the loudest, most aggressive V8-like bark at low RPM and a piercing flat-six scream at redline.\u003c\/li\u003e\n\u003cli data-end=\"1598\" data-start=\"1430\"\u003e\n\u003cstrong data-end=\"1457\" data-start=\"1432\"\u003eCatted Configuration:\u003c\/strong\u003e Retains race-level volume with a slightly smoother, more refined edge—reducing harshness while maintaining an exotic, high-frequency tone.\u003c\/li\u003e\n\u003cli data-end=\"1757\" data-start=\"1599\"\u003e\n\u003cstrong data-end=\"1621\" data-start=\"1601\"\u003eOverall Profile:\u003c\/strong\u003e Lightweight, high-energy sound with exceptional clarity and zero compromise—engineered for enthusiasts who want to be heard and felt.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1762\" data-start=\"1759\"\u003e\n\u003ch3 data-end=\"1795\" data-start=\"1764\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"1795\" data-start=\"1768\"\u003eMaterials \u0026amp; Engineering\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2272\" data-start=\"1796\"\u003e\n\u003cli data-end=\"1896\" data-start=\"1796\"\u003eConstructed from \u003cstrong data-end=\"1847\" data-start=\"1815\"\u003epremium T304 stainless steel\u003c\/strong\u003e for superior strength and corrosion resistance\u003c\/li\u003e\n\u003cli data-end=\"1975\" data-start=\"1897\"\u003ePrecision TIG-welded for structural integrity and a clean, high-end finish\u003c\/li\u003e\n\u003cli data-end=\"2052\" data-start=\"1976\"\u003eMandrel-bent tubing ensures maximum exhaust flow and minimal restriction\u003c\/li\u003e\n\u003cli data-end=\"2131\" data-start=\"2053\"\u003eRace-inspired design reduces backpressure for optimal high-RPM performance\u003c\/li\u003e\n\u003cli data-end=\"2217\" data-start=\"2132\"\u003eEngineered to withstand extreme heat cycles from aggressive driving and track use\u003c\/li\u003e\n\u003cli data-end=\"2272\" data-start=\"2218\"\u003eIntegrated valved system retains OEM functionality\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2277\" data-start=\"2274\"\u003e\n\u003ch3 data-end=\"2307\" data-start=\"2279\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2307\" data-start=\"2283\"\u003ePerformance Benefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2577\" data-start=\"2308\"\u003e\n\u003cli data-end=\"2394\" data-start=\"2308\"\u003eSignificant increase in exhaust flow for improved horsepower and throttle response\u003c\/li\u003e\n\u003cli data-end=\"2462\" data-start=\"2395\"\u003eReduced backpressure for a more free-revving, responsive engine\u003c\/li\u003e\n\u003cli data-end=\"2508\" data-start=\"2463\"\u003eNoticeable weight savings vs. OEM exhaust\u003c\/li\u003e\n\u003cli data-end=\"2577\" data-start=\"2509\"\u003eEnhanced driver engagement through sound, feedback, and response\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2582\" data-start=\"2579\"\u003e\n\u003ch3 data-end=\"2609\" data-start=\"2584\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2609\" data-start=\"2588\"\u003eWhat’s in the Box\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2930\" data-start=\"2610\"\u003e\n\u003cli data-end=\"2686\" data-start=\"2610\"\u003eFull T304 stainless steel race exhaust system (mid-pipes + rear section)\u003c\/li\u003e\n\u003cli data-end=\"2774\" data-start=\"2687\"\u003eCatless straight-through sections or high-flow catted sections (based on selection)\u003c\/li\u003e\n\u003cli data-end=\"2813\" data-start=\"2775\"\u003eIntegrated valved muffler assembly\u003c\/li\u003e\n\u003cli data-end=\"2860\" data-start=\"2814\"\u003eAll required clamps, hardware, and gaskets\u003c\/li\u003e\n\u003cli data-end=\"2907\" data-start=\"2861\"\u003ePlug-and-play valve integration components\u003c\/li\u003e\n\u003cli data-end=\"2930\" data-start=\"2908\"\u003eInstallation guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2935\" data-start=\"2932\"\u003e\n\u003ch3 data-end=\"2960\" data-start=\"2937\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2960\" data-start=\"2941\"\u003eWhy This System\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-end=\"3225\" data-start=\"2961\"\u003eThe 991 GT3 and GT3 RS are engineered with motorsport DNA—but from the factory, they’re still restrained. This race exhaust system removes those boundaries, delivering a raw, uncompromising soundtrack and performance profile that matches the car’s true capability.\u003c\/p\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"3369\" data-start=\"3227\"\u003eFor owners who want their GT3 to sound like it belongs on a starting grid—not a showroom floor—this is the system that defines the experience.\u003c\/p\u003e","brand":"Velocity Performance Parts","offers":[{"title":"Catless \/ 4\" Slash Cut \/ Glossy Carbon Fiber","offer_id":48287138578681,"sku":"14:200004889#standard-2","price":6299.99,"currency_code":"USD","in_stock":true},{"title":"Catless \/ 4\" Slash Cut \/ Signature Satin Black","offer_id":48287143362809,"sku":"14:200004889#standard-3","price":6299.99,"currency_code":"USD","in_stock":true},{"title":"Catless \/ 4\" Slash Cut \/ Brushed","offer_id":48287143395577,"sku":"14:200004889#standard-4","price":6299.99,"currency_code":"USD","in_stock":true},{"title":"Catless \/ 4\" Slash Cut \/ Burnt\/Multicolor","offer_id":48287143428345,"sku":"14:200004889#standard-5","price":6299.99,"currency_code":"USD","in_stock":true},{"title":"Catless \/ 4\" Straight Cut \/ Glossy Carbon Fiber","offer_id":48287143461113,"sku":"14:200004889#standard-6","price":6299.99,"currency_code":"USD","in_stock":true},{"title":"Catless \/ 4\" Straight Cut \/ Signature Satin Black","offer_id":48287143493881,"sku":"14:200004889#standard-7","price":6299.99,"currency_code":"USD","in_stock":true},{"title":"Catless \/ 4\" Straight Cut \/ Brushed","offer_id":48287143526649,"sku":"14:200004889#standard-8","price":6299.99,"currency_code":"USD","in_stock":true},{"title":"Catless \/ 4\" Straight Cut \/ Burnt\/Multicolor","offer_id":48287143559417,"sku":"14:200004889#standard-9","price":6299.99,"currency_code":"USD","in_stock":true},{"title":"Catted \/ 4\" Slash Cut \/ Glossy Carbon Fiber","offer_id":48287138611449,"sku":"14:200004889#standard-14","price":6899.99,"currency_code":"USD","in_stock":true},{"title":"Catted \/ 4\" Slash Cut \/ Signature Satin Black","offer_id":48287143723257,"sku":"14:200004889#standard-15","price":6899.99,"currency_code":"USD","in_stock":true},{"title":"Catted \/ 4\" Slash Cut \/ Brushed","offer_id":48287143756025,"sku":"14:200004889#standard-16","price":6899.99,"currency_code":"USD","in_stock":true},{"title":"Catted \/ 4\" Slash Cut \/ Burnt\/Multicolor","offer_id":48287143788793,"sku":"14:200004889#standard-17","price":6899.99,"currency_code":"USD","in_stock":true},{"title":"Catted \/ 4\" Straight Cut \/ Glossy Carbon Fiber","offer_id":48287143821561,"sku":"14:200004889#standard-18","price":6899.99,"currency_code":"USD","in_stock":true},{"title":"Catted \/ 4\" Straight Cut \/ Signature Satin Black","offer_id":48287143854329,"sku":"14:200004889#standard-19","price":6899.99,"currency_code":"USD","in_stock":true},{"title":"Catted \/ 4\" Straight Cut \/ Brushed","offer_id":48287143887097,"sku":"14:200004889#standard-20","price":6899.99,"currency_code":"USD","in_stock":true},{"title":"Catted \/ 4\" Straight Cut \/ Burnt\/Multicolor","offer_id":48287143919865,"sku":"14:200004889#standard-21","price":6899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/7497\/7273\/files\/H35578c891d0b4d5d80bb2ff58ba107b2G.jpg?v=1776219380","url":"https:\/\/www.velocityperformanceparts.com\/products\/porsche-991-gt3-rs-stainless-steel-full-race-exhaust-system","provider":"Velocity Performance Parts","version":"1.0","type":"link"}