Sam then bolted the AP caliper mounting bracket to the spindles (note that this was a test-fitment and we later added the McGaughy's 2-inch drop spindle). The factory 18mm bolts received blue Loctite and were torqued to 130 lb-ft. The new rotor was then slid onto the hub. Not shown, we later purchased and installed new bearing hubs for the McGaughy's spindles because our hubs had a slight grind when spinning them. This was the perfect time to do some necessary maintenance, and besides, it was a bolt-on affair.