Camshaft Plug Fits: All Jeeps (1987-2002) w/ 2.5L engine; 2-9/64" Diameter. All Jeeps (1972-1990) w/ 4.2L engine; 2-9/64" Diameter. All Jeeps (1987-2004) w/ 4.0L engine; 2-9/64" Diameter. All Jeeps (1971-1991) w/ 5.0 or 5.9L engine; 2-9/64" Diameter.