{"product_id":"porsche-718-gt4-gts-stainless-steel-valved-catback-exhaust-system","title":"Porsche 718 GT4 \/ GTS Stainless Steel Valved Catback Exhaust System","description":"\u003cdiv class=\"flex flex-col text-sm pb-25\"\u003e\n\u003csection 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)))]\" dir=\"auto\" data-turn-id=\"request-WEB:f0aa8435-bdb5-42ec-aa9c-832ab47fdd80-11\" data-testid=\"conversation-turn-24\" data-scroll-anchor=\"true\" data-turn=\"assistant\"\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-message-author-role=\"assistant\" data-message-id=\"6cdeec78-3428-419b-9988-40068636dfe7\" dir=\"auto\" data-message-model-slug=\"gpt-5-3\" 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-turn-start-message=\"true\" 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-start=\"0\" data-end=\"64\"\u003e\u003cstrong data-start=\"0\" data-end=\"64\"\u003ePorsche 718 GT4 \/ GTS Stainless Steel Catback Exhaust System\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"66\" data-end=\"347\"\u003eEngineered to bring out the true character of Porsche’s naturally aspirated 4.0L flat-six, this stainless steel catback system delivers a deeper, sharper, and more engaging driving experience. Refined when cruising, aggressive when pushed—this is how the 718 platform should sound.\u003c\/p\u003e\n\u003chr data-start=\"349\" data-end=\"352\"\u003e\n\u003ch3 data-start=\"354\" data-end=\"367\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"358\" data-end=\"367\"\u003ePrice\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"368\" data-end=\"381\"\u003e\u003cstrong data-start=\"368\" data-end=\"381\"\u003e$2,799.99\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"383\" data-end=\"386\"\u003e\n\u003ch3 data-start=\"388\" data-end=\"403\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"392\" data-end=\"403\"\u003eFitment\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"404\" data-end=\"744\"\u003e\n\u003cli data-start=\"404\" data-end=\"438\"\u003ePorsche 718 Cayman GT4 (2020+)\u003c\/li\u003e\n\u003cli data-start=\"439\" data-end=\"477\"\u003ePorsche 718 Cayman GTS 4.0 (2020+)\u003c\/li\u003e\n\u003cli data-start=\"478\" data-end=\"517\"\u003ePorsche 718 Boxster GTS 4.0 (2020+)\u003c\/li\u003e\n\u003cli data-start=\"518\" data-end=\"600\"\u003eDirect bolt-on catback system — no cutting or permanent modifications required\u003c\/li\u003e\n\u003cli data-start=\"601\" data-end=\"671\"\u003ePrecision-engineered for OEM mounting points and factory alignment\u003c\/li\u003e\n\u003cli data-start=\"672\" data-end=\"744\"\u003eFully compatible with factory exhaust valve controls and drive modes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"746\" data-end=\"749\"\u003e\n\u003ch3 data-start=\"751\" data-end=\"774\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"755\" data-end=\"774\"\u003eSound Character\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"775\" data-end=\"874\"\u003eThe 4.0L flat-six is one of Porsche’s best modern engines—this system lets it breathe and be heard.\u003c\/p\u003e\n\u003cul data-start=\"876\" data-end=\"1345\"\u003e\n\u003cli data-start=\"876\" data-end=\"1003\"\u003e\n\u003cstrong data-start=\"878\" data-end=\"896\"\u003eValves Closed:\u003c\/strong\u003e Deep, refined tone with a smooth, controlled presence. Comfortable for daily driving with minimal drone.\u003c\/li\u003e\n\u003cli data-start=\"1004\" data-end=\"1189\"\u003e\n\u003cstrong data-start=\"1006\" data-end=\"1022\"\u003eValves Open:\u003c\/strong\u003e Aggressive, high-revving flat-six scream with increased volume and sharper top-end. Crisp throttle blips, clean overrun crackles, and a more connected, analog feel.\u003c\/li\u003e\n\u003cli data-start=\"1190\" data-end=\"1345\"\u003e\n\u003cstrong data-start=\"1192\" data-end=\"1212\"\u003eOverall Profile:\u003c\/strong\u003e Fuller, louder, and more defined than stock—reducing factory restriction while maintaining a clean, exotic tone with minimal rasp.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1347\" data-end=\"1350\"\u003e\n\u003ch3 data-start=\"1352\" data-end=\"1383\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1356\" data-end=\"1383\"\u003eMaterials \u0026amp; Engineering\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1384\" data-end=\"1837\"\u003e\n\u003cli data-start=\"1384\" data-end=\"1489\"\u003eConstructed from \u003cstrong data-start=\"1403\" data-end=\"1435\"\u003epremium T304 stainless steel\u003c\/strong\u003e for exceptional durability and corrosion resistance\u003c\/li\u003e\n\u003cli data-start=\"1490\" data-end=\"1556\"\u003ePrecision TIG-welded for strength and a clean, high-end finish\u003c\/li\u003e\n\u003cli data-start=\"1557\" data-end=\"1632\"\u003eMandrel-bent tubing ensures smooth airflow and optimal exhaust velocity\u003c\/li\u003e\n\u003cli data-start=\"1633\" data-end=\"1692\"\u003eIntegrated valved design retains full OEM functionality\u003c\/li\u003e\n\u003cli data-start=\"1693\" data-end=\"1769\"\u003eEngineered to balance exhaust flow and backpressure for peak performance\u003c\/li\u003e\n\u003cli data-start=\"1770\" data-end=\"1837\"\u003eBuilt to handle high heat from aggressive driving and track use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1839\" data-end=\"1842\"\u003e\n\u003ch3 data-start=\"1844\" data-end=\"1872\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1848\" data-end=\"1872\"\u003ePerformance Benefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1873\" data-end=\"2097\"\u003e\n\u003cli data-start=\"1873\" data-end=\"1945\"\u003eImproved exhaust flow for increased horsepower and throttle response\u003c\/li\u003e\n\u003cli data-start=\"1946\" data-end=\"2001\"\u003eReduced backpressure for a more free-revving engine\u003c\/li\u003e\n\u003cli data-start=\"2002\" data-end=\"2047\"\u003eEnhanced exhaust tone and driver feedback\u003c\/li\u003e\n\u003cli data-start=\"2048\" data-end=\"2097\"\u003eLong-term durability with minimal maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2099\" data-end=\"2102\"\u003e\n\u003ch3 data-start=\"2104\" data-end=\"2129\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2108\" data-end=\"2129\"\u003eWhat’s in the Box\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2130\" data-end=\"2360\"\u003e\n\u003cli data-start=\"2130\" data-end=\"2204\"\u003eFull stainless steel catback exhaust system (mid-pipes + rear section)\u003c\/li\u003e\n\u003cli data-start=\"2205\" data-end=\"2243\"\u003eIntegrated valved muffler assembly\u003c\/li\u003e\n\u003cli data-start=\"2244\" data-end=\"2290\"\u003eAll required clamps, hardware, and gaskets\u003c\/li\u003e\n\u003cli data-start=\"2291\" data-end=\"2337\"\u003ePlug-and-play valve integration components\u003c\/li\u003e\n\u003cli data-start=\"2338\" data-end=\"2360\"\u003eInstallation guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2362\" data-end=\"2365\"\u003e\n\u003ch3 data-start=\"2367\" data-end=\"2390\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2371\" data-end=\"2390\"\u003eWhy This System\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2391\" data-end=\"2623\"\u003eThe 718 GT4 and GTS 4.0 are built for precision and driver connection—but the factory exhaust leaves untapped potential. This catback system unlocks a deeper, louder, and more emotional sound while improving flow and responsiveness.\u003c\/p\u003e\n\u003cp data-start=\"2625\" data-end=\"2789\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eFor enthusiasts who want their Porsche to deliver a true motorsport-inspired experience every time they start the engine—this is the upgrade that completes the car.\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\n\u003c\/div\u003e","brand":"Velocity Performance Parts","offers":[{"title":"Default Title","offer_id":48270465433849,"sku":"14:200004891#Catback","price":2799.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/7497\/7273\/files\/Porsche_718_GT4_GTS_Stainless_Steel_Valved_Full_Exhaust_System2.webp?v=1775801359","url":"https:\/\/www.velocityperformanceparts.com\/products\/porsche-718-gt4-gts-stainless-steel-valved-catback-exhaust-system","provider":"Velocity Performance Parts","version":"1.0","type":"link"}