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
1963	Chrysler	300	Base
1963	Chrysler	300	Sport
1970-1971	Dodge	Challenger	Base
1970-1971	Dodge	Challenger	R/T
1969-1971	Dodge	Charger	500
1966-1971	Dodge	Charger	Base
1969	Dodge	Charger	Daytona
1967-1971	Dodge	Charger	R/T
1969	Dodge	Charger	SE
1971	Dodge	Charger	Special Edition
1971	Dodge	Charger	Super Bee
1965-1970	Dodge	Coronet	440
1965-1970	Dodge	Coronet	500
1966-1967,1970-1971	Dodge	Coronet	Base
1971	Dodge	Coronet	Brougham
1971	Dodge	Coronet	Crestwood
1971	Dodge	Coronet	Custom
1966,1968-1970	Dodge	Coronet	Deluxe
1967-1970	Dodge	Coronet	R/T
1968-1970	Dodge	Coronet	Super Bee
1963	Dodge	Polara	500
2015-2018	Ford	Mustang	Shelby GT350
2015-2018	Ford	Mustang	Shelby GT350R
1968-1971	Plymouth	Barracuda	Base
1970-1971	Plymouth	Barracuda	Gran Coupe
1966-1967,1969	Plymouth	Belvedere	Base
1969	Plymouth	Belvedere	Satellite
1965-1967	Plymouth	Belvedere II	Base
1970-1971	Plymouth	Cuda	Base
1966	Plymouth	Fury	Base
1963-1965	Plymouth	Fury	Sport
1965	Plymouth	Fury II	Base
1965	Plymouth	Fury III	Base
1967-1971	Plymouth	GTX	Base
1968-1971	Plymouth	Road Runner	Base
1966-1967	Plymouth	Satellite	Base
1970	Plymouth	Superbird	Base