Aeroflow Small Block & Big Block Chrysler Flexplate Bolts - AF37-2460CHRYSLER FLEXPLATE BOLTS 8740 Material, Pack of 6 Part Number: AF37 2460 Suits the following applications: Small Block Chrysler 273, 318, 340, 360. Big Block Chrysler 383, 413, 440. When installing a new flexplate, it is recommended to replace your flexplate bolts as the old factory ones can fatigue over time. These Aeroflow flexplate bolts are made from chrome moly 8740 for high strength compatibilities. They are black oxide to resist rust and