I've done tons of exhaust work on the car, but I just installed a magnaflow cat-back and the passenger side always ends up higher than the driver, I can't even bring it down far enough to put the exhaust tip on. The drivers side fits fine...
my magnaflow had some fitting issues as well and the pipe burned the cover on the side of the gas tank on the passenger side.....we played with the piping and got roated better so now doesn't hit anything but i think my tips rattle against my bumper. im hopping that a new OR pipe in the future will help thigns out kuz the UPR pipe is horrible as far as fitment, hangs to low
When I bought my car it had a Magnaflow cat-back on it where the passenger tail-pipe wouldn't line up right either. It made this God awful knocking noise(came to find out the kid weld the pipe to the underbody). I'd go to the shop and have them re-adjust it...