Hello Guys: I just would like to know what the actual dynoed HP number or 1/4 mile trap speed on a S5 with header, 2 1/2 in ch center muffler, HKS straight throu cat back exhaust, Holley 650 CFM carb. and Racing Beat Holley manifold would do on my car with no weight reduction on body and stock size street tires.

Thankx

 

Sounds like a good upgrade plan let us know how it does after you hit the dyno.