The importance of pressure plate bolts in a racing or hi-performance street application cannot be emphasized nearly enough These fasteners play a key role in both the performance and safety of a vehicle Because of this, ARP has developed special pressure plate bolts that are application specific to ensure the optimum grip length ARP offers High Performance Series bolts that are made from a premium grade chrome moly and hardened to a nominal tensile strength of 180,000 psi The Pro Series bolts, originally developed for NAScAR Winston cup competition, are stronger and rated at 200,000 psi Both models feature a large diameter, low-profile design complete with washers Pressure Plate Bolt Kit High Performance Series Thread 516-18