− Decrease quantity for Intake Manifold Bolts, Steel, 12-Point Head, Washers, Use On RPM Air-Gap Intake Manifold Only, Ford, 351C, Kit Quantity + Increase quantity for Intake Manifold Bolts, Steel, 12-Point Head, Washers, Use On RPM Air-Gap Intake Manifold Only, Ford, 351C, Kit Add to cart