[Redog]

I believe there are 3 types of spray,

Dry, which is the easiest to install, but hardest on the engine
Wet, which is a bit more difficult to install, but a little bit easier on the engine
direct port, which is very difficult to install, requires plumbing, drilling and so forth, but is the safest bet for the engine.

If you though ou were just going to go on eBay and buy a kit for $100, slap it on the car in 30 minutes and go smoke Corvettes, it's just not going to happen