i have a friend who owns a hobby shop and he has one on his rc10...its on a o.s 15 engine an old one......it doesent really help anything other the looks of the engine...in other words its more of a conversation piece than anything....now this guy is a big time drag racer he builds 7 second all motor street cars so i think he knows a thing or 2 about superchargers...he also says the nitrous kits are a joke also...he says to run a higher nitro content to achieve the same results of the nitrous kit..after all nitrous is about more oxygen and so is higher nitro content