I've done a lot of mix-n-match with my exhaust lol so I figure I might as well throw my opinion out there. Loudness scale of 1-10. 1 being stock
3 - y-pipe, high flow cats (Very raspy...almost hondaish) I no like
11 - y-pipe, high flow cats, gthaus mid pipe and rear. (Extremely loud...I like
)
5 - y-pipe, high flow cats, stock mid pipe, gthaus rear. (Tame exotic sound)
7 - y-pipe, high flow cats, stock mid pipe, no rear. (Deep sound and not too loud)