I would guess you might have LOST a small amount of low end tq, and gained more high rpm HP. My car lost a lot of that low end grunt, not so much that it won't fry the tires with a slightest throttle blip, but after 3-3500rpm, it flat out screams, and pulls clear to redline. It used to die off after about 4500rpm, now i have to be careful or i'm 6250'in every shift. (at least before i got my shift light)