i ran 2 bottles (10lbs bottle) with the ZEX kit on my stock 94 CX . . . i used the 55 jet. . . will using nitrous you have to run colder spark plugs, and most importantly run rich. the nitrous makes power by adding oxygen to the combustion process. so as long as you have enough fuel, you won't lean out, melt pistons, and blow the big D16.