I finally finished installing my exhaust, Pypes o/r x-pipe and cat-back. I have to admit, it sounds good outside the car, but inside the car it sounds horrible. Horrible enough that I am thinking of switching to an h-pipe. The only problem is I cannot find one for a decent price. I would like one with high flow cats, as VA tests for emissions, but the only one I have seen is $600. Also, is the Mac Pro-Chamber more like an H or X-pipe, and what kind of sound will it produce? Any help would be appreciated! Thanks!