I think there is ones with 8 and 12 bolt. What is the difference? A friend in the MV club i belong to dosn't want to deal with hummer parts any more. So i got 2 sets of 8 bolt ones for a 100 and they are on the way up here and a friend said i just wasted my money. He said i need the one with more bolts. SO what the hell do i need?? Why cant i use these? I can get more to if these are good ones to use. Thanks mike 500 for 5 WOW Thats a big jump in price are they really worth it?