Exhaust Manifold Spreader

For re-installing the manifold on small block engines. 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. Install before removing manifold to prevent mis-alignment. Range: 2.1/2inch to 4inch (65 to 100mm) Body diameter: 3/4inch (19mm).