Just about any of them from FASS or PureFlow Tech (Air Dog/ Raptor). The Raptor kits are the easiest and cheapest I've seen. I installed a Raptor 150 on an 02 last week and had it on the truck and running in about 30 minutes. The new quick connect setup they have with the kits are very simple and straight forward. The hardest part was trying to get the factory fuel line unhooked from the factory draw straw on the tank. Although which ever kit you go with, be sure to add a fuel pressure gauge of some kind to the truck. Anything over 18psi and usually the VP44 won't last long.