Hey Guys Up till last night I always heard propane injection only works on turboed engines. Well last night my buddy Wes was reading somewhere that it can be done on a NA 6.2 and that bully dog has a kit for it and you can get 100HP extra with it. Well he had a regulator from a Oxy Acet system so he put it on a propane tank, put the line in the air box intake, and went for a drive on a hill where he usually is lugged down to a max of 50mph in his crew cab dually utility truck. Well the same spot with 5PSI of propane, he was going 70 and had to let off the gas because he was going too fast. He experimented with different pressures and got pinging at 6PSI so 5 is max for this setup. He's working on a better diffuser in the air box and some more testing and I will update as we get more but GUYS: start doing it, he felt the difference in the seat of his pants. He could feel it when he turns it on or off, he said litterally: "I had a squirel under the hood, now I have Three. " More to come. We want to dyno the setup when we get it fine tuned but for now, it's worth it.