01 gt stang off road x-pipe power loss?

[cobrarwanab]

I installed a bbk off road x-pipe on my 01 gt stang and it feels like i lost all my low end torque! Anybody have any idea?

 

[COBRA90GT]

Your power band has been changed (to upper RPMs) - you didn't lose power.

 

[cobrarwanab]

So, when i put my 4:10 gear in the higher rpm will work in my favor? I have stock heads and intake with the exception of a cai. what is the optium rpm range for power band on this app?