Pro Copper Head Gaskets, for 1965-1990 396-454 Mark 4 Big Block Chevrolet.
Bore Opening: 4.630″; Gasket Thickness: .080″; Material: Annealed Copper;
*These gaskets require O-rings in block or head*
For Self Sealing Copper Gaskets to be used with O-rings please see Titan Head Gaskets.
For Self Sealing Copper Gaskets to be used without O-rings, please see ICS Titan Head Gaskets.