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Valved X-Pipe Exhaust System
Fabspeed's valved exhaust design: valves open for full flow and an aggressive note, closed for a tone smoother than stock. A crossover pipe joining the two exhaust banks into an X shape, smoothing flow for a fuller, balanced tone. exhaust system for the Porsche 718 Cayman/Boxster GT4, GTS and Spyder 4.0L (2020+), retaining full Porsche Sport Exhaust: the factory valved exhaust with a driver-selectable loud and quiet mode. functionality. Built around a CAD-flow investment-cast X-pipe and 2.5-inch CNC mandrel-bent T304L stainless tubing, with Helical UK exhaust valves and 304 stainless flanges that reuse the factory gaskets. With PSE off the volume rises subtly; with PSE on and valves open, the tone turns exotic and notably louder. Dyno gains ran up to 38 Nm of torque at 2400rpm and 15whp at 7600rpm, saving 1.8 kg over the factory system.
Frequently asked
Does the Valved X-Pipe Exhaust System fit my 718 Cayman GT4?
This listing is specific to the Porsche 718 Cayman GT4. Exact fitment for your year, trim and options is confirmed on your free consult before anything is ordered.
What does the price include?
The delivered price includes the part from Fabspeed USA, freight to Australia, import costs and GST. Enter your postcode to refine delivery; the final figure is confirmed on consult.
How long until it arrives?
Every Fabspeed part is made in-house at Fabspeed USA with about a one-week production lead time, then allow another 3-4 days for delivery to Australia via UPS. That freight is already included in the price.
Will PSE still work with this exhaust?
Yes, Fabspeed says the system retains PSE functionality, so you keep control over valve position.
How much louder is it with PSE off vs on?
With PSE off there's a subtle increase in volume. With PSE on and the valves open, Fabspeed describes a significant jump to a truly exotic exhaust note.
Can I turn the volume down for track day noise limits?
Yes, Fabspeed offers turn-down tips that cut 3 to 6 dB of exhaust sound level for tracks with noise restrictions.
Is it emissions legal?
Yes, Fabspeed states it's emissions legal in all 50 states with no check engine light.
Which option should I choose?
Porsche changed the 718 GT4/Spyder's exhaust bracket partway through the 2020 model year, at roughly the February 2020 build date. Check which style your car has before ordering, since Fabspeed says this MUST be confirmed. Each bracket style is pictured when you select it above, and if you're not sure which your car has, contact us and we'll confirm it with you.
Who installs it?
Rennen Motorsport in Adelaide, or an authorised dealer near you. Fitting it yourself may also be an option depending on the part, so raise it on your consult; professional installation is quoted separately.
Is it covered by warranty?
Fabspeed products carry the manufacturer's warranty, supported locally through Rennen Plus as the Australian principal. See our returns policy.
Can I just buy this outright, or do I need to talk to someone first?
Every enquiry, whether it's one part or a full build, starts with a free consult. We confirm the exact spec for your car before anything is quoted or ordered.
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