Just got all the data together from our Dynapack Dyno on a long awaited RS we were privileged to get to work on.

As most of you know...

Constructed from 321SS tuned length stepped headers and flapped side connector, the exhaust combination offers a 40whp increase for GT3 owners and 40whp for GT3RS owners with no ecu flash required. By understanding exhaust flow and resonance tuning, Dundon Motorsports developed this combination. The use of the the OEM center muffler and flaps allow for drone free, quiet cruising and a glorious porsche roar when on the throttle! This setup is bolt on and can be selected with or without the exhaust flaps.


991 GT3RS Dundon Race 40whp max gains

991 GT3RS Dundon Race 40whp max gains


991 GT3RS Dundon Race Header 27whp at ~8000rpm


991 GT3RS Dundon Race Header 27whp at 7989rpm




991 GT3RS 30lbft, 26whp gains at ~4600rpm

991 GT3RS 30lbft, 26whp gains at 4566rpm





And for those that didn't see it, check out our other thread, the next graph will make more sense...

https://rennlist.com/forums/991-gt3-...l#post13708764


50whp gains?, nope, just shows that the RS is sensitive and baseline runs have to be thoroughly vetted before you take them as true baselines...

50whp?? , nope, just shows that the RS is sensitive and baseline runs have to be thoroughly vetted before you take them as true baselines...



And last one for fun, 991 GT3RS vs 991 GT3 both with Race Headers


991 GT3RS vs 991 GT3 both with Dundon Race Headers, big brother is still the king by about 20whp peak and 29whp and 24lbft at everywhere

 

Jamie. Can you give us a bit more info on the GT3 vs RS race headers - peak WHP & WTQ for each car?

 

Now 40whp max gains??? That's great! What about with tuned ecu? 50-55whp?

 

What cell count cat are these using?

 

RAce headers don't have the Cats.

 

The Street (catted) are 200cpsi.
The Race headers (graphs in this thread) are no cats.

 

*DELETE*