Intake manifold grommet for PCV valve also known as positive crankcase ventilation.
Dimensions: 0.418" ID x 1.299" OD x 0.5" Thickness
Fits the following Pontiac vehicles equipped with Buick engines:
Bonneville 1978-1988
Catalina 1977-1981
Firebird 1977-1989
Grand Am 1979-1993
Grand LeMans 1975-1981
Grand Prix 1978-1987
LeMans 1975-1981
Parisienne 1984
Phoenix 1977-1979
Sunbird 1976-1980
Ventura 1975-1977