{"product_id":"porsche-718-gt4-rs-opf-2022-valvetronic-muffler-d","title":"Porsche 718 GT4 RS | 2022+ Valvetronic Muffler Exhaust","description":"\u003ch4\u003e\u003cstrong\u003eExhaust Fitment:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePorsche 718 Cayman \/ Spyder GT4 RS \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Year\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2022\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eflat-6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOPF \/ Non-OPF Vehicle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNon-OPF \u0026amp; OPF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eExhaust System Components:\u003c\/strong\u003e\u003cbr\u003eThis exhaust system package includes the following components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eValvetronic Muffler (Retains OEM Valve Settings - No Remote)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eUnlock \u003cb\u003e+17 WHP gains\u003c\/b\u003e and elevate your Porsche 718 GT4 RS driving experience with a dyno-tested, valvetronic exhaust engineered for uncompromising performance and an unmistakable soundtrack.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eOur catless exhaust system delivered a real-world increase from \u003cb\u003e458 WHP to 475 WHP\u003c\/b\u003e, along with sharper throttle response and a more engaging power band \u003cb\u003ewithout triggering a CEL or requiring an ECU tune\u003c\/b\u003e. For European drivers tuning would be required.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eThis high-performance setup combines \u003cb\u003evalvetronic technology with over axle pipes (OAP) \/ downpipes\u003c\/b\u003e, giving you precise control over sound and backpressure. With valves closed, exhaust gases are routed through the muffler to maintain a comfortable, refined tone. When fully open, the system unleashes a raw, motorsport-inspired note that makes every drive feel like a track session.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eCrafted from \u003cb\u003eT304 high-grade stainless steel\u003c\/b\u003e, each component is precision-engineered for perfect fitment, durability, and maximum flow. Custom-designed muffler internals create the GT4 RSs signature high-revving character, while over-axle pipes \/ downpipes remove bottlenecks in the exhaust path to free up power and sound volume.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQ: What does the full exhaust setup consist of?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eA: The complete valvetronic exhaust package features a Valvetronic muffler, over-axle pipes (sometimes called downpipes), and your choice of dual exhaust tips in five different finishes to perfectly match your style.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eCurrently we don't offer headers for the 718 Cayman GT4 RS and 718 Spyder RS model.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQ: How do I control the exhaust valves?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eA:\u003c\/b\u003e The Fi valvetronic exhaust offers full integration with the \u003cb\u003ePorsche Sport Exhaust (PSE) system\u003c\/b\u003e. Using the \u003cb\u003efactory button on the center console\u003c\/b\u003e, you can switch between \u003cb\u003eSport and Comfort modes\u003c\/b\u003e to open or close the exhaust valves:\u003c\/p\u003e\n\u003cul type=\"disc\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"mso-list: l1 level1 lfo2; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eSport mode:\u003c\/b\u003e Valves open for a more aggressive sound.\u003c\/li\u003e\n\u003cli style=\"mso-list: l1 level1 lfo2; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eComfort mode:\u003c\/b\u003e Valves remain closed until reaching higher RPMs (typically between 4,000-5,500 RPM).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003eFi EXHAUST also offers a \u003cb\u003estandalone valve controller\u003c\/b\u003e that bypasses the factory PSE system, allowing you to keep the valves \u003cb\u003efully open at all times\u003c\/b\u003e. This provides uninterrupted, pure exhaust sound without automatic modulation.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003ePlease note: The \u003cb\u003eFi remote controller and the factory PSE control are not interchangeable\u003c\/b\u003e. You will need to choose one method for controlling your valves.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cbr\u003e\u003cb\u003eQ: Will this exhaust system trigger a check engine light (CEL)?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eA:\u003c\/b\u003e A \u003cb\u003emuffler-only replacement will not trigger a CEL\u003c\/b\u003e on any GT4 RS model, as the factory cats are not being replaced.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eFor \u003cb\u003eNon-OPF models\u003c\/b\u003e the \u003cb\u003eover-axle pipes\u003c\/b\u003e (OAP) also \u003cb\u003ewill not trigger a CEL\u003c\/b\u003e, since only the \u003cb\u003eheader-mounted sensors are monitored\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eOur recommendation for Non-OPF vehicles\u003c\/b\u003e: Pair the \u003cb\u003eFi EXHAUST over-axle pipes and valved muffler\u003c\/b\u003e to achieve the most \u003cb\u003einvigorating sound profile\u003c\/b\u003e without requiring tuning or risking any CEL. This setup has been tested in real world conditions with zero issues.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eFor \u003cb\u003eOPF-equipped models\u003c\/b\u003e (typically European-spec), over axle pipes are monitored and tuning would be required to prevent CEL from being triggered.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQ: What kind of performance gains can I expect? \u003ci\u003eHow much horsepower increases? \u003c\/i\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e A dyno test on North American Non-OPF model showed real-world gain of \u003cb\u003e+17.2 HP and +6.1 Nm\u003c\/b\u003e, achieved without tuning and with \u003cb\u003eno CEL\u003c\/b\u003e. The exhaust setup included a \u003cb\u003evalved muffler and over-axle pipe\/downpipe\u003c\/b\u003e, tested under consistent environmental conditions. The gains reflect \u003cb\u003ereal-world improvements\u003c\/b\u003e without any additional engine tuning.\u003c\/p\u003e\n\u003cul type=\"disc\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStock Exhaust Dyno Results\u003c\/b\u003e:\u003cbr\u003eMax Power: \u003cb\u003e458.35 HP @ 8,150 RPM\u003c\/b\u003e\u003cbr\u003eMax Torque: \u003cb\u003e330.34 Nm @ 6,020 RPM\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli style=\"mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eWith Fi EXHAUST Muffler + Over-Axle Pipes\/Downpipe Dyno Results\u003c\/b\u003e:\u003cbr\u003eMax Power: \u003cb\u003e475.58 HP @ 8,080 RPM\u003c\/b\u003e\u003cbr\u003eMax Torque: \u003cb\u003e336.43 Nm @ 5,890 RPM\u003c\/b\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQ: What is a Non-OPF model?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eA:\u003c\/b\u003e A Non-OPF model is a vehicle \u003cb\u003enot equipped with an Otto Particulate Filter (OPF \/ GPF)\u003c\/b\u003e. These filters are typically installed on \u003cb\u003eEuropean-spec cars\u003c\/b\u003e for emissions compliance. GT4 RS models in \u003cb\u003eCanada, the USA, and select other markets\u003c\/b\u003e are Non-OPF and have \u003cb\u003efewer monitored sensors\u003c\/b\u003e, making them ideal for free-flowing exhaust upgrades without the need for tuning.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQ: How does the sound compare to the stock GT4 RS exhaust?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eA:\u003c\/b\u003e With valves open, the sound is \u003cb\u003esharper, louder, and more motorsport-inspired\u003c\/b\u003e, while still being clean and resonant. Valves closed, the system delivers a \u003cb\u003erefined, quieter experience\u003c\/b\u003e suitable for daily driving. It's a true dual-character exhaust.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eQ: Is this compatible with aftermarket headers or factory components?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eA:\u003c\/b\u003e Yes. The Fi EXHAUST system features \u003cb\u003eprecision-fit flanges\u003c\/b\u003e and is fully compatible with both \u003cb\u003eOEM and most aftermarket headers\u003c\/b\u003e if connecting points are developed based on OEM measurements.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Which models is this exhaust compatible with?\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eA: \u003c\/b\u003eThe Fi EXHAUST system is compatible with the Porsche 718 Cayman GT4 RS and 718 Spyder RS models. It supports both Non-OPF versions (such as U.S. and Canadian cars) and OPF-equipped European models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExhaust Fitment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePlease read our \u003ca href=\"https:\/\/store.fi-exhaust.com\/pages\/shipping-returns\" title=\"Shipping \u0026amp; Return\"\u003eShipping \u0026amp; Return\u003c\/a\u003e policy for questions related about the exhaust fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Images:\u003c\/strong\u003e Our product images may feature a catback exhaust system with downpipes\/headers for reference. However, please be aware that downpipes\/headers are not included with the purchase of the catback exhaust system and need to be purchased separately.\u003c\/p\u003e","brand":"Fi EXHAUST","offers":[{"title":"Silver \/ Yes","offer_id":42406883983445,"sku":null,"price":5000.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ No","offer_id":42406884016213,"sku":null,"price":4200.0,"currency_code":"USD","in_stock":true},{"title":"Titanium Blue \/ Yes","offer_id":42406884048981,"sku":null,"price":5200.0,"currency_code":"USD","in_stock":true},{"title":"Titanium Blue \/ No","offer_id":42406884081749,"sku":null,"price":4400.0,"currency_code":"USD","in_stock":true},{"title":"Diamond Black \/ Yes","offer_id":42406884114517,"sku":null,"price":5200.0,"currency_code":"USD","in_stock":true},{"title":"Diamond Black \/ No","offer_id":42406884147285,"sku":null,"price":4400.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ Yes","offer_id":42406884180053,"sku":null,"price":5250.0,"currency_code":"USD","in_stock":true},{"title":"Gold \/ No","offer_id":42406884212821,"sku":null,"price":4450.0,"currency_code":"USD","in_stock":true},{"title":"with Carbon Fiber \/ Yes","offer_id":42406884245589,"sku":null,"price":5380.0,"currency_code":"USD","in_stock":true},{"title":"with Carbon Fiber \/ No","offer_id":42406884278357,"sku":null,"price":4580.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0074\/3702\/5395\/files\/kies-motorsports-fi-exhaust-porsche-718-gt4-rs-2022-valvetronic-muffler-exhaust-1232481954.jpg?v=1776282949","url":"https:\/\/www.kiesmotorsports.com\/products\/porsche-718-gt4-rs-opf-2022-valvetronic-muffler-d","provider":"Kies Motorsports","version":"1.0","type":"link"}