Pro Copper Head Gaskets for Chevrolet Mark IV Big Block
Bore Opening: 4.320″ Gasket Thickness: .021″


Pro Copper Head Gaskets, for 1965-1990 396-454 Mark 4 Big Block Chevrolet.
Bore Opening: 4.320″; Gasket Thickness: .021″; Material: Annealed Copper;
*Pro Copper head gaskets require O-rings in block or head* For Self Sealing Copper Gaskets to be used with O-rings please see Titan (T13_ _ _ series) Head Gaskets.
For Self Sealing Copper Gaskets to be used without O-rings, please see ICS Titan (S13_ _ _ series) Head Gaskets. Package Contents: 1 Pair.
Pro Copper HG Inst   O-Ring Instructions
Qualifies for Contingency Payout in selected classes with proof of purchase and decals on both sides, see respective association websites for class posting details.

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Additional Information

Weight1.5 lbs
Dimensions6 x 6 x 3 in
Bore Opening


Gasket Thickness