Great Compatibility: Fits for ESST Left Nav 303 Engine; Fits for 2004-2010 E-Series 6.0L Diesel Engines; Fits for 2004-2005 Excursion 6.0L Diesel Engines; Fits for 2004-2007 F-250/350/450/550/650/750 Super Duty 6.0L Diesel Engines; Fits for 2006-2009 Low Cab Forward Engine System. Fits for 2008-2010 F-250/350/450/550 Super Duty 6.4L Diesel Engines. Powerful Functions: Comparable to OEM part number 6660 303-757 both in quality and functions. .