HEAD GASKET CHEV SB 400 4.200in BORE .051thick

Felpro steel core laminate head gasket with 4.200 inch bore, 0.051 inch compressed thickness for Chevrolet Small Block. Extra-thick to reduce compression and correct piston-valve clearance problems. Has 400 steam holes. Can use on aluminum block with liners. Pre-flattened steel wire ring.