I have an 06' with Full Belanger setup:
Full length Headers, High Flow Cats, 3" Magnaflow Mufflers.
Idle and anything below 2,000 - 2,500 rpm and it is not too loud, but if you mash the throttle and/or cruise 2,500 rpm or above then it may be too loud for you.
I like the loud exhaust note with...