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. This carburetor float bowl kit is a fine example of how ARP takes extraordinary steps to produce the very finest products of their kind on the market today, and it is a smart way to attach a Holley float bowl. The bolts are made from 304 stainless steel, virtually impervious to corrosion, and the polished finish makes them an enhancement to any carb. Each bolt features a hex style head with 5/16" wrenching, and they are nominally rated at 170,000 psi. This kit contains 4 bolts, and is specially designed for select Holley carbs with dual metering blocks.