Intake Horn Gasket - Cummins 5.9L - 1989 - 2007 - 3969988 Cummins OEM Includes 1 Gaskets Fits 1989 - 2007 Cummins Light Duty Diesel Engines 12v & 24v 5.9L 1998.5-2007 24v requires 2 Gaskets 1989-1998 12v requires 1 Gasket