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Muffler Bypass Pipes
Muffler bypass pipes for the Porsche 996 GT3 (1999-2005), replacing the heavy factory mufflers with straight-through tubes for a deep, growling Supercup-style tone and minimal cabin An unwanted droning resonance at certain highway rpm, where exhaust pulses match the cabin's natural frequency.. Built from mandrel-bent T304L stainless steel and finished with polished stainless tips, the system adds 11whp and 9.5 Nm of torque across the rev range while saving 23 kg from the rear of the car. Used by Rolex Grand-Am, PCA/POC and HPDE track drivers. Simple DIY bolt-on installation, no cutting or welding required. Fitting through Rennen Motorsport or an authorised dealer is just as straightforward, for owners who'd rather not do it themselves.
Frequently asked
Does the Muffler Bypass Pipes fit my 911 GT3 / GT3 RS?
This listing is specific to the Porsche 911 GT3 / GT3 RS (996). 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.
How much power do the bypass pipes add?
Fabspeed's dyno testing showed gains of 11whp and 9.5 Nm of torque, carried throughout the rev range.
Will it make the car louder?
Yes, expect a deep, growling tone that's noticeably more aggressive than stock, with minimal cabin drone.
What's included?
The pipes come with polished stainless steel tips, and install as a straight bolt-on with no cutting or welding.
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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