[rppngears]

I am about to purchase a set of BBK shorty unequal length headers, a BBK off road hpipe and a set of flows to replace my dynomax cat back. However, I was reading a previous post and according to it, I am not really going to notice and horsepower gains from it. I also will probably not notice that big of a change in the sound over just the regular flowmasters.

Could I take a poll of everyone who has aftermarket headers or H pipe on whether or not they increased either horsepower or the sound of your mustang.