The Moroso intake manifold bolt kit for Chevrolet big block applications supplies a mixed set of fasteners: twelve 3/8in-16 x 1.25in bolts plus four 3/8in-16 x 1.75in bolts. This packaged assortment covers varied manifold mounting points, simplifying reassembly by providing the correct lengths for different locations so you can replace worn hardware with a matched set.
Moroso Chevrolet Big Block Intake Manifold Bolt Kit - (12) 3/8in-16 x 1.25in & (4) 3/8in-16 x 1.75in