The Supertech titanium valve retainer for VW fits 8mm valve stems and a triple-groove arrangement. Described as a titanium retainer for 8mm stems, it matches triple-groove valve setups where that stem diameter is specified. Use it as the replacement retainer when the application calls for an 8mm, triple-groove component.
Supertech VW Titanium Retainer for 8mm Valve Stem Triple Groove