Don’t risk installing an old set of off-the-shelf valve stem seals when building your 2003-2010 Ford 6.0 or 6.4L Powerstroke heads, use high quality Powerstroke Products PP-VSS valve stem seals instead. These are the same seals that are used for Powerstroke Products complete cylinder head assemblies. These seals are sold in sets of 16 which is enough for one cylinder head. Order a quantity of 2 when doing both heads.
Sold In Sets Of 16
High Quality Valve Stem Seals