I really like the sound with the Needswings CAIs. I have a single on the roadster and a dual on the coupe. if you think it sounds good from the drivers seat have someone do a drive by with wot in first and you will be impressed. Once on a mountain road in the coupe I hit wot comming out of a turn and passed a man on a bicycle on the off side apron. By the look on his face he must have thought the devil himself was on his coat tails. Still laugh when I think about that look.