ok i just installed my supercharger and had problems and found you guys help thanks. but i came accross another problem i noticed i needed a stock pulley and i have an aftermarket one for my crank and i removed the 4 bolts on the out side but theres a big bolt in the middle and i didnt try to remove it yet because im worried i need a powertool is is easy to remove like the rest?? also i dont have a torque wench should i just pay someone to install the pulley???