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991.2 GT2 RS Non-Valved Sport Cats
Non-valved High-flow catalytic converters replacing the factory units, trading some emissions scrubbing for better exhaust flow and sound than stock. for the Porsche 991.2 GT2 RS (2018+), replacing the factory ceramic 700-cell cats and titanium center muffler with German HJS 200-cell tri-metallic units that flow about 92% of a straight pipe and exit straight through the rear bumper. Fabspeed measured gains of 7 whp and 10 lb-ft at the wheels (8.5 hp and 12 lb-ft at the engine) with no check engine light and no tune required, alongside noticeably sharper turbo response and exhaust sound. Built from 14-16 gauge mandrel-bent T304 stainless steel and emissions-compliant in 49 states, excluding California. Installs with just 2 clamps per side.
Frequently asked
Does the 991.2 GT2 RS Non-Valved Sport Cats fit my 911 GT2 RS?
This listing is specific to the Porsche 911 GT2 RS (991.2). 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 trigger a check engine light?
No, Fabspeed states the sport cats are optimized for no catalyst-related check engine light, and no tune is required.
Is this legal for street use?
Fabspeed states the cats are emissions-compliant in 49 states, excluding California.
What happens to the factory muffler?
It's eliminated. The sport cats exit straight through the rear bumper cover in place of the OEM titanium muffler.
How difficult is installation?
It's a simple bolt-on job, with just 2 clamps on each side to remove to fit the new cats.
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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