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This Cometic copper head gasket fits Chevrolet Mark‑IV big block V8 engines with a 4.630" bore and .043" thickness. The copper construction requires less clamp load and features embossed outer layers coated with Viton to conform load distribution and improve sealing. No sealants or re-torque are required, and the design aims to reduce bore distortion when used with the appropriate head and block combination.
Cometic Chevy Big Block 4.630in Bore 0.043in Copper Head Gasket
