it is a nitrous express wet nitrous system, it only shoots at wide open throttle and the switch that triggers it is on the throttle in the engine bay..i have a switch to turn on when i decide that i want to have it armed and ready to use..the kit ran me about 500 dollars..the install wasn't very hard...took about 2 hours approx..after watching all my q's of the install that i had b4 were answered...for fuel enrichment there is nothing you need to do besides switch to a colder plug which i am doin tomorrow by gettin the zex plugs cuz i am ready to move it up to the 50 shot for a few days b4 i run to my 75 shot were i will keep it...at just the 35 shot it made a pretty big difference...i ripped the hell out of a berretta last nite..it wasn't that quick but yet it was just funny...you can hear system runnin which sounds great...i hope to get some times when the track opens in town here soon.