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The Supertech 6mm triple-groove valve locks are precision retainers for Audi, BMW and Opel valve stems, sold as a set of 16. They secure the valve spring assembly to the stem and are intended for engines using 6mm stems. Each lock requires two pieces per valve; this set supplies the quantity needed for multiple valves and supports routine assembly or rebuild work where OEM-style locking is specified.
Supertech Audi / BMW / Opel 6mm Stem Triple Groove Valve Lock (Req 2 Per Valve) - Set of 16
