a well built spray kit will be cheaper and do just as much as the Ntercooler thing.. water has a higher specific heat and evaporating water involves a phase change .. it will carry the heat away from the heatsink.. ahem.. intercooler better than spraying it with gas which wont phase change and has a lower specific heat (ie cant soak as much heat) ..

intercoolers soak the heat out of the charge as it passes through it.. the air flow on them carries that heat away.. putting a fine mist on the IC and in the air flowing through the fins will allow that air to carr alot more heat away from the IC ..

my 2 pet peeves on turbo cars are turbo timers and nitrous on intercoolers .. 2 rather expensive wastes of money.

but its not my money .. and all your boys will go ooohh aaahh over it.