All Balls Racing Rear Shock Seal Head Assemblies are a complete assembly, ready to install. Direct O.E.M. replacement featuring the latest O.E.M. style seal with pre-scraper. All designs incorporate an air bleed hole for easy re-assembly. Direct O.E.M. replacement featuring the latest O.E.M. style seal with pre-scraper. All designs incorporate an air bleed hole for easy re-assembly. Kit Includes (most models): 1 rear shock seal head(s). 1 snap ring(s). Note: Kit contents will vary by fitment and are subject to change.