My water injection system is composed of the same parts or equivelant to those supplied in the collingmist kit. Works great and saves you $1000s. I am running a 50/50 mixture of distilled water and denatured alcohol. 60 psi shurflo pump feeding into .5mm and .4mm aquamist waterjets. system activates at 7psi. You can either buy all the parts individually or just get the coolingmist kit. Either way it'll be around the same price in the end, but with the kit you don't have to go searching around for stuff. Do it!!! Budget performance... to hell with wasting money on practically free mods.
I changed the intercooler to throttlebody pipe to a stainless 90 degree mandrel bend because the threads for aquamist waterjets are very very fine and every time i tapped the threads into the stock pipe the threads would flake off. cast iron is too malleable.