You all know the factory studs are swedged in and taking them out the back is gonna jack the factory knurl up as the swedge is a fatter area of the stud that keeps it from pulling out. You need to cut the heads off the back and drive whats left out through the front, or use a swedge cutter and reduce the swedge to less than the knurl diameter. Remember that there are 7/16 studs for the 5 on 4 8 3/4 too so putting a 1/2-20 stud as the replacement part number for this title is misleading unless you state that its for the LBP axles.