Pro Copper Head Gaskets, for 1965-1990 396-454 Mark 4 Big Block Chevrolet.
Bore Opening: 4.250″; Gasket Thickness: .072″ *Special Order Thickness*; 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.
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.