i heard most of the rasp is due to the pipes vibrating against eachother on the header. apparently, more welding helps.. i read that somehwere on here (the dude said he stuck a flathead screwdriver inbetween the pipes and it stopped.
Anyway, I am gettin the Strup Exhaust next week.

 

i have a trd cai and axel back exhaust. i have a set of mmw headers and s-pipe, and then a zpi mid-pipe. the headers have a cel eliminator, but i worry that the mid-pipe will set it off cause the tc has a cat in both the headers and the mid-pipe. i have held back on install because one is time, and the worry about my tc sounding terrible. also, since i live in md, my car has to pass emissions, and a cel is an automatic failure, would there be anyplace to fit a high flow cat and resonator in there, or should i just keep my stock pipes for when i get my emissions test notices?