I have thought of the pro charged deal. Would probably go with a f1-x rather then the f2. The f1-x is a little more adjustable then the f2 from what i can see from buddies cars. I have a buddy with a f2 on a 565 and runs low 4.30's turned all the way down Then a buddy with a 540 with a f1-x that runs 4.4's on a easy tune and can turn it down more if needed. It also went a 4.27 with the same settings down in the carolina's in better air.

Its only money, i just need to make more of it to do so lol