Millenia S Intercooler co2 SPRAY!?!?!?

Hey, I've been thinking of how to get some hp outta my millenia s and i cant find anything!! Well i thought of something thats real simple and seems pretty safe but i need your opinions...
Im thinking of the intercooler sprayer. It sprays co2 on the intercooler where its supposed to drop up to 50 degrees of the intake charge and increase almost as much hp.
What do yall think? Safe? worth it? Any other mods?
thanks!!

it's safe but not really worth it.. I Think a custom hood would help, designed to send air to both intercoolers.