









718 GT4 / GTS / Spyder 4.0liter engine to - GT4RS Conversion Package (2020+)
FS.POR.718GT4.RSVLVX-1
Fabspeed Motorsport USA CAD designed a GT4RS state of the art exhaust RETROFIT UPGRADE for all owners of 718 4.0L cars GT4, GTS, Spyder so they can install aΒ Fabspeed MAXFLO GT4RS lightweight exhaust on their cars. All 2020 - 2024 4.0Liter regual 420HP owners can now have a Bolt-On conversion Package is the premium solution for adding dynamic performance and superlative sound to your GT4 / GTS / Spyder on the street. Delivering well over 400 horsepower to the wheels with easy-to-install bolt-on upgrades (on a GT4 / Spyder / GTS 4.0L), there is no better option for you as an owner seeking maximum power and performance while retaining catalysts and the stock ECU tune. Will work fantastic with a Deman Motorsport 4.5 liter engine build too! Simply install the Fabspeed 718 GT4RS conversion Performance Package and get all the power you ever need. Fully street and racetrack tested on PDK and Manual cars! ONLY Fabspeed Motorsport that concurrently owns a 718 GT4 manual, GT4RS, Boxster Spyder can possibly design and inhouse manufacture a world class innovative system so any 718 4.0 liter owner can have GT4RS exhaust performance and sports car sound on their cars and eliminate extra complications as a direct replacement bolt-on .
SOUND:
With PSE (Porsche Sport Exhaust) on and the valves open, this system turns the 4.0L's exhaust note into a truly exotic sound GT4RS sound with a significant increase in volume utilizing our iconic and highly sought after GT4RS X-pipe. This system will turn heads as you rip by, some cheers from the nearby pedestrians may have you hitting the accelerator a little more often. Tolerable enough for street driving and highway cruising, and intoxicating when driving with a bit more spirit.
POWER:
After many dyno hours and incremental refinements to our design we were able to achieve dyno gains of 25 WHP and 19 FT/LBS of TQ at 7500 RPM. Best of all, power gains are seen as low as 3700 RPM, so there are power gains across the entire power band!
Options:
- Fabspeed Porsche 718 GT4 RS Valvetronic X-Pipe
- Fabspeed Porsche 718 GT4 RS Titanium Valvetronic X-Pipe
FEATURES:
- Fits all Porsche 718 Cayman/Boxster GT4/GTS/Spyder Cars worldwide (2020 - 2024+)Β
- Significant Dyno gains across the RPM band +30 HP and +22.8 FT/LBS of TQ
- Weight savings of -20 lbs / -9 KG'sΒ
- 100% Complete BOLT-ON conversion - includes 4.0L to GT4RS over axel pipes and Fabspeed state of the art GT4RS rear valvetronic system. Nothing else to buy.Β
- Constructed from CNC mandrel-bent T304L stainless steel or Titanium (Depending on selected option)Β
- BothΒ T304 and Titanium Valved systems uses Helical Valves imported from the U.K. which are the highest quality valves on the market
- HELICAL limited are the ONE and ONLY exhaust valves that should be USED on any sports car - Helical 100% bullet-proof used exclusively my Ferrari, McLaren, Aston Martin, Pagani, Keoniggseeg and Porsche GT3 race and street cars. NO Cheap 100% guaranteed to fail Chinese Taiwanese mongrel exhaust valves. IF its NOT Helical U.K. - ask questions and DO NOT be a sucker and buy any exhaust with no name guaranteed to fail valves.Β
- Side effects may include extreme euphoria and uncontrollable laughter. Some users have expressed acceleration-induced excitement.Β
- Fabspeed is not responsible for miles per gallon lost, however; smiles per gallon gained is entirely our fault
- Optimized for maximum performance with no fault codes no check engine light, guaranteedΒ (USA Models Only, EU models please inquire)
- Choose between real Carbon Fiber, Satin Black, Polished Stainless, Brushed Stainless 70mm I.D. tips. You cant not reuse stock tips as they CHOKE and limit exhaust flow.Β
- Simple bolt-on installation, no cutting or welding required
- Fabspeed has over 30+ years of Porsche air and water cooled excellence
- All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty

718 GT4 / GTS / Spyder 4.0liter engine to - GT4RS Conversion Package (2020+)
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
Most in-stock items ship within 2β3 business days from our U.S. warehouse or directly from the manufacturer. Custom or made-to-order parts may have extended lead times, which will be noted on the product page.
Once your order ships, youβll receive tracking details via email.
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FAQβs
Common questions are answered directly on our [FAQ page], including details about shipping, returns, warranty coverage, and how to verify product fitment.
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Contact Us
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FAQs
Please read our FAQs page to find out more.
How do I know if a part fits my car?
Every product page includes detailed fitment information covering model, year, and variant. If youβre unsure, reach out to our team with your VIN or vehicle details β weβll confirm compatibility before you order. Our goal is to ensure every part fits the first time.
Are you an authorized dealer for the brands you carry?
Yes. House of Fuel works directly with our manufacturing partners and authorized distributors to guarantee 100% authentic products. This ensures you receive genuine parts backed by the full manufacturer warranty and support.
How long does shipping take?
In-stock items typically ship within 2β3 business days. Lead times for made-to-order or imported parts vary by brand, and estimated delivery windows are listed on each product page. Youβll receive tracking as soon as your order ships!
What is your return policy?
We accept returns within 14 days of delivery on new, unused items in their original packaging. Custom, special-order, or electronic components may be non-returnable. For all return requests, contact us first β weβll help you through the process quickly.
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