Yes, you need new hardware (mine did anyway). A longer bolt and several flat washers to bring the indention level with the rest of the diffuser. I went to a higher level hardness bolt as well. The other thread gives details on the bolt and washer combos some have used. Make sure you leave the stock washer (which has a lip on it) in the stock location and layer a washer or two on top of it, then the hook, another flat washer then bolt it down.