It is a water methanol injection and has been around for for a while. Used as far back as WWII on prop driven airplanes (that I know of- maybe longer). It lowers the intake temps and adds a higher octane, so you can run higher boost psi's and more timing; thus making more HP (in a turbo or other forced induction application). Snow Performance sells a really good kit for trucks and has info on it (I had the single shot on my 01 Cumins Ram- 488RWHP and 704ftbls torque at the tires).
