First off water injection systems only work on a diesel hoenstly. OTR truck drivers and diesel drag races have been doing this for a while now, and they do it ONLY to cool their intake charge further. Preferably they use methanol (like gas powered turbo cars do). All they are selling is a chemical intercooler system, probably a piss poor one at that. You want a good system, check out snow performance.
Snow Performance: Home
Methanol injection systems have a use in N/A vehicles as well. But in a much more limited application.
__________________

23:23] blkIROC355: sometimes when i pee i make that sound the light sabers make
[23:23] SpecialK LS1: lmao
[23:23] blkIROC355: and play with the stream
[23:23] SpecialK LS1: that's just wrong