Bare Knuckle Performance, ARP lower shock mount bolts

12-point black oxide chromoly. - These bottom bolts/nuts/washers use 1/2-20 threads that are cut back just enough that the threads will not engage and damage your shock eyelets or bushings, promoting longer shock life - High Performance specialists know ARP bolts are a great way to keep heads & crankshaft components of extreme performance engines together. So, these 12-point ARP bolts are not the cheap way to install your shocks, but if you want the best these are it - OEM replacement reference 4081.