Help ensure the proper sealing of your vehicles valve cover by using ARPs professional quality valve cover bolts. 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. ARP takes extraordinary steps to produce the very finest products of their kind on the market today. These bolts are manufactured from polished Stainless 300 steel, a proprietary alloy that is impervious to rust and corrosion, and feature compact and easy access 12-point style heads. Each bolt is size 1/4-20 with an under head length of .812, and the set of 14 bolts comes complete with premium-quality washers.