Intake Manifold Gasket. 4 Intake Manifold Gaskets. 1995-1999 BUICK CENTURY 3.1L 189CID V6 OHV, (12 VALVE), VIN CODE "M". 1995-1996 BUICK REGAL 3.1L 189CID V6 OHV, (12 VALVE), VIN CODE "M". 1995-1998 BUICK SKYLARK 3.1L 189CID V6 OHV, (12 VALVE), VIN CODE "M".