Checking if your car is mechanically sound is always a good thing

. Other then that, if ur upgrading to apr stage I, all i would look at is your current DV. If your DV is a 710n, then you are good to go, otherwise, i would consider upgrading the diverter valve to a 710n or a aftermarket diverter valve. Oh and then enjoy the new boost in power, it really makes the car a lot more fun to drive! Say hi to Mike for me!