all it does is freeze thew intake air it doesnt go straight into the motor otherwise its kill your motor its made to be used with nitrous turbos and blowers. it can also cool the fuel line intake and radiator with one spray its very consevative and cheap to fill like 10 bucks. very safe also.

EDIT: heres the website http://www.cryo2.com/products.asp?m=sc&cid=1