Um, no, it is about velocity, if bigger was better, we would have 3" primary headers, and 5" cat backs, the stock cat back flows fine, on our local 600+HP whippled 3800, it ran with a stock catback for a little while, now a 3" is on there, unless you are making more than 350WHP, you might as well just burn the money.......Originally Posted by SilverGT
and the Dyno gain on the RSX, peak horsepower isn't what it is all about, sure the car could have gained 12hp at the top, but what about the losses in the middle and the bottom, I'd bet the average HP was lower......
