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The Supertech steel retainer for SPR-H1000 series springs is made for an 8.0mm triple‑groove valve stem. Intended as the replacement retainer, it secures the spring and keeper on valvetrain assemblies that use triple‑groove 8.0mm stems in the H1000 family, providing correct seating and installed height for engine service or component replacement where that stem configuration is present.
Supertech Steel Retainer for SPR-H1000 Series 8.0mm Triple Groove Valve Stem
