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The HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block.

This Part Fits:

Year Make Model Submodel
1987 Buick Regal GNX
1984-1987 Buick Regal Grand National
1987 Buick Regal Limited
1983-1986 Buick Regal T-Type

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