Dundon Convertible Street (Catted) tuned length headers and valved side delete exhaust system for the 991.2 GT3, GT3 RS and Speedster are available now! We were able to keep all of the things that people love about our race headers:
quiet when you want it to be
lifetime structural warranty
100% 30 day money back guarantee! if you try it and don't like it, send it back we'll give you your money back!
Convertible to no cats with the swappable test pipes for track days (available separately).
We use 321SS (a superior grade of Stainless steel to the cheaper 304SS) and use a metal core spiral wound 200CPSI catalytic converter. All our products are mfg in the USA in our shop in Gig Harbor, WA.
By routing the primaries up and positioning the catalytic converter more vertical we were able to retain 99% of the primary length of the race system. This is how we are able to achieve 40whp max gains on the 991.2 GT3RS, This is the most power from a catted 991.2 GT3RS exhaust system.
The Dundon Street Headers on 991.2 GT3RS
40ftlbs at 4300rpm
40whp at 8800rpm
Speedster drivers, we're happy to introduce our full Street Header/Lifetime Muffler Exhaust Power Package Exhaust for the US Spec (non-EU Spec) 2020 Speedster:
1. Eliminates the OPF
2. No Check Engine Lights, and no tuning required
3. 47lbft and 20hp at the wheels gains over stock.
4. 25lb weight savings over the stock exhaust system.
5. Complete bolt on system Including
Dundon Tuned Length 321 Stainless Headers
Advanced High Flow Cats
Electronic Valves retained for comfortable cruising and that signature Dundon sound when you want it!
Designed for use with GT3 Style Center mufflers sold separately. Please select muffler option so the supplied muffler adapters are sized correctly, either for OE GT3 or Dundon.