{"product_id":"porsche-991-gt3-rs-stainless-steel-valved-full-exhaust-system","title":"Porsche 991 GT3 \/ GT3RS Stainless Steel Catted Valved Exhaust System","description":"\u003csection data-turn=\"user\" data-scroll-anchor=\"false\" data-testid=\"conversation-turn-19\" data-turn-id=\"0bbdac31-902f-4e94-bed9-b37e3c2fbcfc\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-(--header-height)\"\u003e\u003c\/section\u003e\n\u003csection data-turn=\"assistant\" data-scroll-anchor=\"true\" data-testid=\"conversation-turn-20\" data-turn-id=\"request-WEB:f0aa8435-bdb5-42ec-aa9c-832ab47fdd80-9\" dir=\"auto\" class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-turn-start-message=\"true\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-3\" dir=\"auto\" data-message-id=\"de3ec2dc-d3b1-4694-804a-622e0e031e8d\" data-message-author-role=\"assistant\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word dark markdown-new-styling\"\u003e\n\u003cp data-end=\"66\" data-start=\"0\"\u003e\u003cstrong data-end=\"66\" data-start=\"0\"\u003ePorsche 991 GT3 \/ GT3 RS Stainless Steel Catted Exhaust System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"387\" data-start=\"68\"\u003eEngineered to elevate one of the most iconic high-revving platforms ever built, this stainless steel catted exhaust system unlocks the true voice and performance of the 991 GT3 and GT3 RS—without sacrificing refinement. Sharper, cleaner, and more exotic, this is the perfect balance of raw sound and everyday usability.\u003c\/p\u003e\n\u003chr data-end=\"392\" data-start=\"389\"\u003e\n\u003ch3 data-end=\"407\" data-start=\"394\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"407\" data-start=\"398\"\u003ePrice\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-end=\"421\" data-start=\"408\"\u003e\u003cstrong data-end=\"421\" data-start=\"408\"\u003e$5,899.99\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-end=\"426\" data-start=\"423\"\u003e\n\u003ch3 data-end=\"443\" data-start=\"428\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"443\" data-start=\"432\"\u003eFitment\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"747\" data-start=\"444\"\u003e\n\u003cli data-end=\"491\" data-start=\"444\"\u003ePorsche 911 GT3 (991.1 \u0026amp; 991.2 | 2014–2019)\u003c\/li\u003e\n\u003cli data-end=\"542\" data-start=\"492\"\u003ePorsche 911 GT3 RS (991.1 \u0026amp; 991.2 | 2016–2019)\u003c\/li\u003e\n\u003cli data-end=\"623\" data-start=\"543\"\u003eDirect bolt-on installation — no cutting or permanent modifications required\u003c\/li\u003e\n\u003cli data-end=\"674\" data-start=\"624\"\u003eDesigned for precise OEM fitment and alignment\u003c\/li\u003e\n\u003cli data-end=\"747\" data-start=\"675\"\u003eFully compatible with factory exhaust valve controls and drive modes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"752\" data-start=\"749\"\u003e\n\u003ch3 data-end=\"777\" data-start=\"754\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"777\" data-start=\"758\"\u003eSound Character\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-end=\"828\" data-start=\"778\"\u003eRefined when you need it—ferocious when you don’t.\u003c\/p\u003e\n\u003cul data-end=\"1525\" data-start=\"830\"\u003e\n\u003cli data-end=\"958\" data-start=\"830\"\u003e\n\u003cstrong data-end=\"850\" data-start=\"832\"\u003eValves Closed:\u003c\/strong\u003e Deep, smooth tone with a refined, controlled presence. Comfortable for street driving with minimal drone.\u003c\/li\u003e\n\u003cli data-end=\"1153\" data-start=\"959\"\u003e\n\u003cstrong data-end=\"977\" data-start=\"961\"\u003eValves Open:\u003c\/strong\u003e High-pitched, motorsport-inspired scream with increased volume and exceptional clarity. Crisp throttle blips, sharp upshifts, and aggressive yet controlled overrun crackles.\u003c\/li\u003e\n\u003cli data-end=\"1387\" data-start=\"1154\"\u003e\n\u003cstrong data-end=\"1181\" data-start=\"1156\"\u003eCatted Configuration:\u003c\/strong\u003e Delivers a cleaner, smoother exhaust note compared to catless setups—reducing harshness and rasp while maintaining a strong, exotic tone. Perfect for those who want performance without excessive rawness.\u003c\/li\u003e\n\u003cli data-end=\"1525\" data-start=\"1388\"\u003e\n\u003cstrong data-end=\"1410\" data-start=\"1390\"\u003eOverall Profile:\u003c\/strong\u003e Balanced and sophisticated—enhancing the GT3’s signature 9,000 RPM character with a more defined, premium sound.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1530\" data-start=\"1527\"\u003e\n\u003ch3 data-end=\"1563\" data-start=\"1532\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"1563\" data-start=\"1536\"\u003eMaterials \u0026amp; Engineering\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2061\" data-start=\"1564\"\u003e\n\u003cli data-end=\"1665\" data-start=\"1564\"\u003eConstructed from \u003cstrong data-end=\"1615\" data-start=\"1583\"\u003epremium T304 stainless steel\u003c\/strong\u003e for maximum durability and corrosion resistance\u003c\/li\u003e\n\u003cli data-end=\"1773\" data-start=\"1666\"\u003eIntegrated \u003cstrong data-end=\"1713\" data-start=\"1679\"\u003ehigh-flow catalytic converters\u003c\/strong\u003e for improved emissions flow without excessive restriction\u003c\/li\u003e\n\u003cli data-end=\"1840\" data-start=\"1774\"\u003ePrecision TIG-welded for strength and a clean, high-end finish\u003c\/li\u003e\n\u003cli data-end=\"1916\" data-start=\"1841\"\u003eMandrel-bent piping ensures smooth airflow and optimal exhaust velocity\u003c\/li\u003e\n\u003cli data-end=\"1997\" data-start=\"1917\"\u003eEngineered to reduce backpressure while maintaining ideal exhaust scavenging\u003c\/li\u003e\n\u003cli data-end=\"2061\" data-start=\"1998\"\u003eDesigned to handle extreme heat from high-revving track use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2066\" data-start=\"2063\"\u003e\n\u003ch3 data-end=\"2096\" data-start=\"2068\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2096\" data-start=\"2072\"\u003ePerformance Benefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2334\" data-start=\"2097\"\u003e\n\u003cli data-end=\"2169\" data-start=\"2097\"\u003eIncreased exhaust flow for improved horsepower and throttle response\u003c\/li\u003e\n\u003cli data-end=\"2236\" data-start=\"2170\"\u003eReduced backpressure for a more efficient, free-revving engine\u003c\/li\u003e\n\u003cli data-end=\"2289\" data-start=\"2237\"\u003eOptimized balance of performance and drivability\u003c\/li\u003e\n\u003cli data-end=\"2334\" data-start=\"2290\"\u003eEnhanced engine note and driver feedback\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2339\" data-start=\"2336\"\u003e\n\u003ch3 data-end=\"2366\" data-start=\"2341\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2366\" data-start=\"2345\"\u003eWhat’s in the Box\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2612\" data-start=\"2367\"\u003e\n\u003cli data-end=\"2456\" data-start=\"2367\"\u003eFull stainless steel catted exhaust system (high-flow catted sections + rear exhaust)\u003c\/li\u003e\n\u003cli data-end=\"2495\" data-start=\"2457\"\u003eIntegrated valved muffler assembly\u003c\/li\u003e\n\u003cli data-end=\"2542\" data-start=\"2496\"\u003eAll required clamps, hardware, and gaskets\u003c\/li\u003e\n\u003cli data-end=\"2589\" data-start=\"2543\"\u003ePlug-and-play valve integration components\u003c\/li\u003e\n\u003cli data-end=\"2612\" data-start=\"2590\"\u003eInstallation guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2617\" data-start=\"2614\"\u003e\n\u003ch3 data-end=\"2642\" data-start=\"2619\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2642\" data-start=\"2623\"\u003eWhy This System\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-end=\"2939\" data-start=\"2643\"\u003eThe 991 GT3 and GT3 RS are engineered for precision and emotion—but the factory exhaust limits their true acoustic potential. This catted system refines and amplifies the experience, delivering a cleaner, more exotic sound while maintaining the usability expected from a high-end performance car.\u003c\/p\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"3104\" data-start=\"2941\"\u003eFor enthusiasts who want the perfect blend of aggression, refinement, and engineering integrity—this is the exhaust system that brings the entire package together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"Velocity Performance Parts","offers":[{"title":"Default Title","offer_id":48270396457209,"sku":"14:200004889#standard","price":5899.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/7497\/7273\/files\/Sf761f78472a3466ebf0cc88b9061dadec.webp?v=1776217473","url":"https:\/\/www.velocityperformanceparts.com\/products\/porsche-991-gt3-rs-stainless-steel-valved-full-exhaust-system","provider":"Velocity Performance Parts","version":"1.0","type":"link"}