Allstar 12-Point Zinc Plated Intake Manifold Bolt Kit Chevy Small Block/Mopar A/B (Pack of 12) is constructed from grade 8 material. It features 12-point flanges and features a clear zinc coating. The bolts are 3/8 inches x 1-1/8 inches long to fit a small block Chevy and Chrysler a/b engines where the clearance is insufficient for standard hex head bolts. The stainless washers are included. It is backed by a 90-day limited factory . It is sold as one set of 12 pieces.