HEAD GASKET CHEV SB 4.000 x .028 COMPOSITION each

Genuine GM, as used on their crate motors. GM Recomends use on 4inch bore only, but gasket measures 4.050in, so probably ok for 4.020, providing combustion temp not too high and good clamping force achieved & maintained. Head Gasket, Composite, 4.000 in. Bore, .028 in. Compressed Thickness, Chevy, 283/302/307/327/350, Each