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 Buick vehicles equipped with Buick engines:
Apollo 1973-75
Centurion 1971-73
Century 1973-91
Electra 1963-90
Estate Wagon 1963-83
Gran Sport 1965-67
GS 1970-72
GS 350 1968-69
GS 400 1968-69
GS 455 1970-72
Invicta 1963
LeSabre 1963-91
Park Avenue 1991
Reatta 1988-91
Regal 1973-91
Riviera 1969-91
Roadmaster 1991
Skyhawk 1975-89
Skylark 1963-91
Special 1963-69
Sportwagon 1964-72
Wildcat 1963-70