I have an 03 mach 1 that I just put a flowmaster american thunder 2 chamber cat back on. I also bought a bbk offroad xpipe but havent put it on yet. I love the sound of the flows but want it to be a little louder. Debating on if I should put that x-pipe on or get a catted one. It seems a little hollow sounding now like not much back pressure. Im wooried about having the exaust be to free flowing and losing power? anyone noticed a gain or decrease with this combo? the rest of the car is stock. I would really like to use it since I already bought it, but not if is gonna lose power or sound like crap. I lnow it will be loud and thats not a problem but will it retain the same sound? thanks

i think one of the most underrated xpipes is the one i have from Mustangtuning.com. It sounds really good w/ the Flows and is surprisingly smooth sounding. Even the guy who installed it thought it was smooth sounding. For the price, u cant beat it. once i get my laptop working (f'ing virus), i will try and post a video of my exhaust 