Powerbuilt 648458 Exhaust Manifold Spreader Spreads warped manifolds on GM small-block V8s and V6s so that bolt holes line up correctly Uses 3/4-in hex wrench Can be used in pairs Spreads warped manifolds on GM small-block V8s and V6s Ensures bolt holes line up correctly Uses 3/4 inch hex wrench Can be used in pairs Plated steel