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
Some pics installed on the car, the street headers are only about 0.5" shorter than our race headers. To fit everything we had to go up into the wheel well where the side mufflers sit. Only way to get the length required for real power gains...