what are you looking for in an exhaust?
in the two month i had my nsx, i have gone through 3 exhaust systems and I think i have finally found the one for me!
GT lightweight - Good quaility exhaust, love the weight savings, maybe 30% louder than stock, but I found it to be wayyyy to quiet for a car like the nsx. To gain more volume I removed my cats and ran this exhaust w/ a test pipe for a while.
GT lightweight w/ test pipes would be on a volume of 10 (1-10 scale)
GT lightweight w/ cats would be on a volume of 3
B&B Triflow - Some fitment issues, which B&B is still workign with me on, I think the tips looks real nice and this exhuast is DEEP!!!! Sound great, but not enough volume up in the higher RPMs, rating of a 5.
JGCT exhaust - WOW!!!!!!!!!! Finally, almost what i am looking for, pretty deep down low, thou not B&B like, but produces a sweet note through out the entire RPM range. My exhaust also came w/ the Silencers which i have not tried yet. But I would rate the volume of this exhaust at a 7.5. I am acutally looking to put back on the test pipes again, and running it w/ the silencers for everyday, and removing it for the days running w/ the ferrari guys!
THat's my .02 cents