My IT7 car feels slow, obviously it's not suppose to be a rocket but I feel as though I'm down on some HP.

It's all stock minus a header/exhaust, some fancy looking plug wires, and that's about it!

At Road Atlanta it will hit 103-105ish down the back straight before the braking zone into 10.

The car revs smooth and seems to run fine, just lacks some grunt, then again it is a 12A.

Is there anything I can do to gain a few horses in straight line grunt?