Milodon's Intake Manifold Bolts are designed to firmly secure the intake manifold and gaskets to the engine block without worry of loosening or leaking. These bolt sets are heat-treated and have a compact, 3/8" hex head that allows the use of standard non-12 point socket wrenches (6-point). A black oxide finish ensures long durability and reliability. Available for popular small and big block Chevy and Chrysler applications.