I am using premium fuel (shell v power) and a clean air filter, I have the afe CAI. And I did do a 20 inch wheel modification.

But when I floored it the X was climbing from 110 to 120 very slowly, and I assumed it was because it was limited at 120. I guess I'll give it another try if I get the chance.

Also, when traveling at high speeds on a highway for a long period of time should tire pressure be inflated above the normal limit significantly? Right now im at 38 psi front and 42 rear. Should I go up to 40 psi front and 44 rear? Or more?

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