itz_alan - Parts that we design for street use give specific characteristics. Our CAI was designed to broaden the power curve, hence you see the nice bump in the hp and torque.
"peak" means @ peak RPM. Maximum power gain was 24whp @ 4750rpm which is less then peak. At peak RPM the intake cam of the MSP can't keep up with the amount of air that's available, hence peak values are lower.
When reading a dyno, you want to make sure that it was done on the same car, under the same or at least as similar as possible conditions. YOu want to look at the absolute difference. This will give you your gains.
In-house testing has shown on our various cars we used for R&D ~30whp maximum gain @ stock boost levels with our true full turbo-back system. It also broadened the hp & torque curves substantially and eliminated any sort of turbo lag.