Make sure you get the truck dyno tuned (diablo chip). The motor can handle 15psi if it dosen't detonate but that supercharger isn't going to last long. I run 12psi mostly and the truck is still super fast but I have run with 15psi no problems. Those Nittos make the biggest difference and the pully's are the cheap go fast parts. An open filter is a great mod and with the higher boost it sounds so sweet.