DescriptionExhaust Manifold Bolt Set of 12Set of twelve (12) Exhaust Manifold Bolts for the 1988-98 6bt or 6CT CumminsBolts for mounting exh manifold to cyl head.Fits the 5.9L and 8.3L 12 valve mechanical injection pump engines only ! Not for the 24v engines.Grade = 10.9No returns