Maybe it's just me and my 170K mile 4000, but I seem to notice a strange power band. The power seems to peak at right before 4000 RPM and drop from there. I don't have much power above 5000 RPM. My other car is an old M3 and the power doesn't start until 4000 RPM and is strong all the way until red line. A different cam I know will help this, but should it be as extreme? -=Nick