The HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block.
User 1
Installation Instructions


This Part Fits:

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