intercooler is a good thing, an we benafit all the way around.

1) aids in cooling air

2) allows more air into cylinder

3) cause ya get more air in cylinder, better power

with just a intercooler mod, you'll notice a slightly better power, slighty lower operating temp's, and with the lower temps, it will last some what longer over all than stock. then if ya what to play, I'd add a water injection system, vs a propane system. I'm in the same mind set as Zeitgeist, not really looking for 500hp kinda power, just good solid power, that runs for a lot of miles, and low maintnice. Just so ya know, I choose water injection cause it's a proven fact than it also helps keep the tops of the pistons clean, as well as the valves, don't know if propane does.