I have a 95 GSR and Dynoed with a Skunk2 IM, CAI, DC 4-2-1 Header, Stock Cat, Apexi N1 Bpipe, T1R Axle back and Tuned it with a Apexi VAFC II and put down 156 whp....i recently got a T1R resonated Test pipe and im going to go back and see the gains from it