To maintain a reputation for "zero defects", ensure optimum quality control, and produce fasteners of exceptionally high quality, ARP controls all aspects of the manufacturing process, performing all operations in-house where they can be closely monitored. These water pump pulley bolts are a good example of how ARP takes extraordinary steps to produce the very finest products of their kind on the market today. To provide the reliability required in racing and high performance street applications, these 170,000 psi fasteners securely attach the water pump pulley. You can count on them to perform, and washers are included.