IJO1357 Features: * For reinstalling the manifold on small block Chevrolets * A simple way to expand a warped manifold so all bolt holes are accurately aligned * Helps prevent cross-threading of manifold bolts * Works best when used in pairs or install before removing manifold to prevent misalignment * Skin-packed Shipping wt. 6 oz. * Exhaust Manifold Spreader for Small Block Chevrolet Warranty: * Lifetime warranty does not cover abuse