When installing a new intake manifold it is recommended to upgrade your intake bolts, some standard intake manifold bolts won't work depending on aftermarket intake manifolds. These Aeroflow intake bolts are madefrom chrome moly 8740 for strength. They are coated in ablack oxide finish for protection and long-lasting durability. Each bolt featuresa compact 12-point head which is ideal for use where space is minimal on most aftermarketintake manifolds compared to the factory bolts with a larger head. Each set includesthick flat washers for optimumclamping pressures to ensure asure seal.