hope this helps....i had a blitz nur spec on my s14a 200sx....i think i may have prematurly damed my ears...talk anout loud...anything above 2700 rpm mate and its like stand under a jet plane.
i run a scorpion exhaust on the zed and its pleasently pleasing with a nice bark around 2500-3000rpm but not over powering.At cruising speeds you would hardly know it was there untill you put your foot down