how much HP does this supercharger add to the engine cause on the procharger website it says it will add up to 2300 HP but that cant be cause i can just put that on any car and i will beat u like u never been beaten.

i think they boost it to like 380hp

I highly recommend the Vortech supercharger over ATI's procharger as it comes with a tunable piggyback - way safer and more power.