i have not had the car on a dyno or been down the track with it yet . they only way i can gauge the power is racing my friend in his 89 fox mustang back in 2006 my motor 73 340 with 8.5 to 1 was rebuilt to stock spec expt for a comp cam part kit # SK20-223-3 he told me his mustang ran high 13s and beat me the first time we raced him i then up graded to air gap intake and headers but was still being beat me so i pulled the stock j head 188 valve bolted on eddy RPM heads ported with 208 valve and with a ported intake then put in Lunati's Voodoo # 10200702 with 1.6 PRW rockers ran 2500 rpm stall then dropped in a 3.91 shure grip in it. lets just say his mustang could no longer keep up ! :) the last thing i did was add the whiplash cam and could tell that it had more power then the lunati i ran before seem to pull better at a dig i have a rev limiter on my car so i dont turn it past 6000 but i would say it pulls hard form 1500 to 6000 RPM i know some guys turn their 340s higher so i cant till you how the cam preforms past 6000 rpm. i am not knocking the comp or Lunati they were great cams i just end up liking the whiplash cam the most.