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Fabspeed Porsche 718 GT4 RS Valvetronic X-Pipe Cat-Back Exhaust System (2022+)

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Calculated at Checkout
TQ (ft/lbs):
WT (lbs) / (KGs)::
-3 / 1.4

Transform your GT4 RS’s exhaust note and ADD significant power versus the stock GT4 RS rear exhaust. FABSPEED's proprietary  X-pipe design gives the GT4 RS the same high pitched wail as the GT3 and it’s totally plug-and-play with the factory exhaust valve system so you can quiet down the exhaust using the factory PSE button.  

Our design process started with 3D scanning the entire OEM exhaust system using our CREAFORM 700 Handscan so that we could make a complete Solidworks 3D model of the exhaust. We then designed the exhaust and fixtures using that model so that the exhaust fit perfectly to OEM standards. After multiple revisions for sound and dyno testing we decided to use our signature investment cast  X-Pipe to tie the  FLAT 6 engine's two separate Right & Left cylinder banks together for exhaust scavenging and to defeat resonance. We also went to great lengths to eliminate drone on this exhaust, utilizing helmholtz resonator technology to cancel out unwanted frequencies that “drone.” Porsche GT4RS and SPYDER RS owners and shops- the FABSPEED GT4RS rear valvetronic is 100% guaranteed to be the best sounding, most reliable and most powerful system available. 


Wondering why your GT4 RS doesn’t have the same high pitched scream of the GT3? Our Valvetronic X-Pipe is the solution! Our X-pipe design merges the two exhaust banks for an intoxicating 9000 RPM symphony. Even though this system will net you a significant increase in volume over stock, the valved design allows you to control the volume with the factory PSE (Porsche Sport Exhaust) button, quieting the exhaust note for a drone free driving experience. 


Comparing our development car equipped with our Over Axle Link Pipes, our Vavletronic X-Pipe added +7.5HP (+6.2 HP at the rear wheels)  at 8100 RPM and +11 ft/lbs of TQ at 3500 RPM. WE designed and DYNO developed multiple systems BEFORE we settled on the very best system in terms of sound and horsepower. Trust Fabspeed with over 30 years or experience!


  • Fits all Porsche 718 GT4 RS 2022+ Models worldwide and RS Spyder too- incase you trade in the Cayman GT4RS.
  • Dyno proven power gains that are significant and maximized. 
  • Saves -3 lbs / 1.4KGs compared to the factory system
  • Completely retains PSE valved exhaust functionality
  • Uses aerospace quality Helical Limited exhaust valves imported from the the United Kingdom. 
  • Helical ISSO certified exhaust valves are the WRLDs VERY FINEST exhaust valves and are used by Ferrari, McLaren, Pagani, KOennigeegs and Porsche GT3 cars. 
  • HELICAL exhaust valves are the 1 and ONLY exhaust valve that any GT4RS or BUYER should allow to be used on their exhaust.
  • ASK any other brand what exhaust valve they use? If they balk and its NOT Helical imported from Great Britain 0 RUN and run fast as they are pushing cheap Chinese 100% guaranteed to fail exhaust valves. Often sandblasted trash to obscure original. It matters!
  • Helmholtz resonator technology eliminates drone
  • Incorporates our signature cast X-pipe for superior flow and exhaust scavenging
  • This cat-back system is emissions legal in all 50 states and the rest of the world (ROW)
  • Constructed from high-quality 14-16ga CNC mandrel-bent T304L stainless steel for optimum flow and maximum durability
  • Laser scanned and CAD designed for perfect OEM fitment using an Ametek Handyscan 700
  • No Check Engine Light guaranteed
  • Simple DIY bolt-on installation- VIDEO installtion online and comes with all hardware.
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty


Returns Policy

To RETURN any system, product or merchandise you must contact us first for a Return Authorization (RA) Number. Special order and custom made systems, apparel, Carbon Fiber Wall Art, and other certain merchandise are NOT returnable. ALL SALES ARE FINAL. To return a Fabspeed Motorsport product an RA number must be requested and if granted the item(S) must be in original Fabspeed Motorsport sealed packaging. A copy of the original invoice and a brief explanation must accompany all returned items. You must follow our instructions for returning items carefully, or Fabspeed Motorsport reserves the right to charge a 25% restocking fee on any OPENED box or repackaged products. Customers are responsible for return shipping charges. If an order was shipped with a promotional “Free Shipping”, and the order is returned, we exclusively reserve the right to charge the customer or distributor for the cost of that original shipping and handling. If a Fabspeed Motorsport Performance package is ordered, and an individual component of that package is returned, Fabspeed Motorsport reserves the right to charge back the performance package discount along with any additionally offered discounts. Return shipped items DAMAGED in transit will RESULT in additional charges up to and including rejection of the competent. It is the customer’s responsibility to ship safely and properly. No returns accepted after 30 days from the invoice date. No credits will be given after 30 days from the invoice date.

To qualify for return, the product must be unused and remain in the original packaging, as well as match the current design and packaging for the product at the time of return. Sounds is subjective and therefore does not qualify for a return of a used product. See Sound Solution Guarantee to see if your product is covered.

Periodically mistakes are made when ordering, or a wrong part is shipped, and you may wish to return an item. We will do everything reasonable to satisfy you. Please contact Fabspeed Motorsport immediately via email at to discuss the circumstances before returning any products. Anything returned without prior authorization from Fabspeed Motorsport will be refused. All returns must be sent back fully prepaid. Our customer service department ( will issue a Return Authorization Number, which must accompany any return. A copy of the original invoice and a brief explanation must accompany all returned items. No returns accepted after 30 days from the invoice date. No credits given after 30 days.


Fabspeed Motorsport cannot be held liable for refusal of, delay of, loss of, theft or damage to a shipment of any item. The customer agrees to indemnify Fabspeed Motorsport for all costs, fees and expenses Fabspeed Motorsport incurs as a result of any violation of any local, state, federal, national or international laws or regulations. Customer agrees to take responsibility for lost packages that were not independently insured or sent without requiring signature. The customer understands they will be liable in the event of additional fees, tariffs, or legal issues such as border seizure. Customer accepts these risks and agrees to release Fabspeed Motorsport of all liability.

Fabspeed Motorsport reserves the right to charge a shipping and handling fee on every order being shipped from our facility. This fee is universal and applies to all retail and wholesale purchases and cannot be waived or credited.

A 6% sales tax will be implemented for every purchase made by a Pennsylvania resident. This fee will be charged for in-house installations and products purchased online, over the phone, and/or via email, this fee is required by law, is non-negotiable and non-refundable.

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