The Supertech titanium retainer for VW 2.0L 16V engines fits 7mm valve stems with a single-groove design. Specified for that engine family, the titanium construction is noted in the description and the single-groove fit ensures compatibility with single-groove valves. Sold as the described retainer for installations requiring a 7mm single‑groove part.
Supertech VW 2.0L 16V Titanium Retainer 7mm Valve Stem Single Groove