These Synergy caster sleeves are a direct-fit steering adjustment component for 2005 and later Ford F-250 and F-350 Super Duty 4x4 trucks. They serve as replacement caster adjustment hardware to restore or adjust front suspension geometry after lift or maintenance, offered as vehicle-specific sleeves that fit the Super Duty front suspension systems for those model years.
Synergy 2005+ Ford F-250/F-350 Super Duty 4x4 Caster Sleeves