Originally Posted by KMIII
What would be the difference in sound and power gains when comparing the challenge street to the other 2 models (Sports, Race). I know the Race is completely catless so it would have the greatest power increase. What would I be losing if I went with the Street version?
The street is the x-pipe only, it doesn't have the deleted primary cat. So you have to connect your oem primary cat onto it or get a turner test pipe and go cat less