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The Supertech titanium valve retainer is specified for use with SPR-H1000 springs and 6.6mm valve stems. Presented as a replacement retainer, the titanium construction is noted in the source and the part is intended for valve-train servicing or when replacing retainers to match SPR-H1000 spring setups and 6.6mm stem dimensions.
Supertech Titanium Retainer for SPR-H1000 / 6.6mm Valve Stems
