I know, Duttweiler ran 4" on his red car prior to sale. What 8 second GNs are running a single 3"? Also, I was curious - does DSP ever do 3"? Just looking for more specifics on what seems to be a Daniel pet-peeve lately. I will agree that 3" exhaust may not be the best for all-around power throughout the curve. However, I would not generalize and say that 3" is a waste of money.