GSC Power-Division Viton Valve Stem Seals for the Subaru EJ257, EJ207, and EJ205 6mm seal set. These are an upgrade from the standard OEM material to help cope with the higher heat caused increasing the performance of your engine.
Sold as a set of 16
A no brainer since the oem are roughly the same price might as well go ahead and get these.
If you are looking at Valve Seals, you mind as well. Chances are you need them. GSC provides proper performance and seal with these, for the extra $13 you will definately get your moneys worth and heads as well as engine longevity!