I've always wanted the jackson racing supercharger but,everyone I know who had one,has nothing but problems with theirs and they also say it doesn't make a huge increase. JR claims the charger is for a stock motor. when you add intake ,header and exhaust,you'll need more fuel,and then the air/fuel mixture would change. JR told me that I would need nothing but a stock motor for this charger to work best. My friends have them and their cars are always breaking down,and running like shit. I don't want to be left o the side of the road. They also have all that extra bullshit, like cam gears,intake,header,exhaust,adjustable fuel regulator,etc. I beleive things like underdrive pulleys and an msd box would help give better performance without screwing with the chargers purpose. But anything else,would cause problems. what do you guys think?