Fitment: 1999 – 2010 – F-250 Superduty, with 3.5″ Axle Diameter 1999 – 2010 – F-350 Superduty 2000 – 2006 – Excursion 2009 – 2013 – E-250 2009 – 2013 – E-350 – with 3.5″ Axle Diameter Kit Includes: Pair (2) Rear Axle Spring U-Bolt Plate Bracket Note: – Please double check compatibility as well as the OE number prior to purchasing. – Instructions are not included. Professional installation is recommended – Contact us if we can assist you further.