pretty much they are supporting mods for the tunes. minus the pcv reroute that diverts oil from going into your intake an the egr blocker plate just blocks air from going into the egr since i had it turned off through efi live. the lift pump is a pump that jams fuel up rather than having it sucked up from the tank because thats bad for the cp3 and my big tunes wouldn't work the the stock fuel psi.. if there was any psi to begin with, and the air box mod just opened up the stock air intake so it could breathe easier