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Valved X-Pipe Cat-Back Exhaust System
Fabspeed's Valved X-Pipe Cat-Back Exhaust gives the 718 GT4 RS (2022+, also fits the Spyder RS) the same high-pitched wail as the GT3, using a signature investment-cast A crossover pipe joining the two exhaust banks into an X shape, smoothing flow for a fuller, balanced tone. that ties the flat-six's two cylinder banks for better scavenging, with A chamber tuned to cancel a specific frequency, used here to cut exhaust drone without restricting flow. tech to cancel drone. It's plug-and-play with the factory PSE valve system, so volume stays controlled from the Sport Exhaust button, using the same aerospace-grade Helical UK exhaust valves fitted to Porsche's own GT3. Fabspeed's dyno testing showed 7.5hp (6.2whp at the rear wheels) at 8100rpm and 11 ft-lbs of torque at 3500rpm, while saving 3 lbs (1.4kg). Built from CNC mandrel-bent T304L stainless steel, it's emissions legal in all 50 states and worldwide with no check engine light.
Frequently asked
Which cars does the Valved X-Pipe Cat-Back Exhaust System fit?
Fits your 718 Spyder RS. Fabspeed lists this piece for: all Porsche 718 GT4 RS 2022+ Models worldwide and RS Spyder too. 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.
Does this keep the factory PSE volume control?
Yes, it's plug-and-play with the factory PSE valve system, so you still control volume from the Sport Exhaust button.
How much power does it add?
Fabspeed's dyno testing showed 7.5hp (6.2whp at the rear wheels) at 8100rpm and 11 ft-lbs of torque at 3500rpm.
Will it drone on the highway?
No, the system uses Helmholtz resonator technology specifically to cancel out unwanted droning frequencies.
Is it emissions legal?
Yes, it's emissions legal in all 50 states and worldwide, with no check engine light.
Which option should I choose?
Tip finish, carbon fiber, satin black, polished or brushed stainless, or reusing your factory tips, is a styling choice only and doesn't change the exhaust's sound or power.
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.
