| Vehicle | Engine |
|---|
| 2010-2015 Western Star 4900FA | 15.6L 6 Cyl DIESEL |
| 2010 Western Star 4900FA | 12.8L 6 Cyl |
| 2009-2015 Western Star 4900FA | 14.8L 6 Cyl DIESEL |
| 2005, 2007 Western Star 4900FA | 11.1L 6 Cyl DIESEL |
| 2004-2014 Western Star 4900FA | 14.0L 6 Cyl Turbo/Aftercooled DIESEL |
| 2004-2009 Western Star 4900FA | 12.8L 6 Cyl Turbocharged DIESEL |
| 2004-2009 Western Star 4900FA | 12.5L 6 Cyl DIESEL |
| 2003-2008 Western Star 4900FA | 12.7L 6 Cyl Turbo/Aftercooled DIESEL |
| 2002-2011 Western Star 4900FA | 14.6L 6 Cyl |
| 2002-2004, 2011-2013 Western Star 4900FA | 15.8L 6 Cyl Turbocharged DIESEL |
| 2002-2004 Western Star 4900FA | 10.3L 6 Cyl Turbocharged DIESEL |
| 2002-2004 Western Star 4900FA | 12.0L 6 Cyl Turbocharged DIESEL |
| 2002-2003, 2007, 2009, 2011-2015 Western Star 4900FA | 14.9L 6 Cyl |
| 2002 Western Star 4900FA | 10.8L 6 Cyl Turbocharged DIESEL |