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