[Focusedat50]

1. No, you don't have to add more fuel to the mixture at this point. 2. I have the shorty header, hi-flo cat, flex pipe combo and compared to stock, yes you can feel and hear a definite difference. Does it give you as much gains as a race header, no but if you need to stay legal then the shorty combo is a nice mod and you will see a difference. Throw in a TB and I believe you will be very satisfied.

My 2¢