I have a 90 na and I was set on a x pipe for my exhaust but I heard if I went with a non resonated x pipe it would be to loud and would resonate a lot inside my car they told me to use a h pipe resonated and the horsepower would not much different so now I'm bck to square one thinkin wht set up to use now so if guys can throw ur 2 cents and let me knw ur toughts I would appreciate it a lot thanks