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Sport Headers
A center muffler replacement for the Porsche 991 GT3 and GT3 RS (2014-2016), CNC-cut from T304L stainless steel and scanned from the OEM muffler for a precise, bolt-on fit. Uses a cast X-pipe merging the two banks for exhaust scavenging and a 7-chamber design that mirrors the factory muffler's An unwanted droning resonance at certain highway rpm, where exhaust pulses match the cabin's natural frequency.-free character, even with Removes the catalytic converters entirely; legal only for closed-course track or off-road use, not street driving. race headers fitted. Paired with Fabspeed's side muffler bypass pipes, gains ran to 37 Nm of torque and 16whp (18hp at the crank). Retains full Porsche Sport Exhaust: the factory valved exhaust with a driver-selectable loud and quiet mode. functionality; OEM gaskets and hardware are reused.
Frequently asked
Does the Sport Headers fit my 911 GT3 RS?
This listing is specific to the Porsche 911 GT3 RS (991.1). 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 this drone?
No. Fabspeed mimicked Porsche's 7-chamber muffler design specifically to keep it drone free, even when run with cat-less race headers.
Does it keep PSE valve function?
Yes, Fabspeed says it completely retains PSE valved exhaust functionality.
How much extra power if I pair it with the Side Muffler Bypass Pipes?
Fabspeed says pairing this muffler with their Side Muffler Bypass Pipes adds 37 Nm of torque and 16 wheel horsepower, or about 18 hp at the crank.
Do I need extra hardware to install it?
Yes, Fabspeed notes it requires the OEM gaskets and hardware to be reused, and lists the specific Porsche part numbers if you don't already have them.
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.
