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The Supertech steel valve retainer is specified for SPR-TS1015 applications on Mazda Miata engines with a 6-degree seat reference. As a steel option, it serves the same fitting purpose as titanium retainers but matches the SPR-TS1015 spring interface for that Miata configuration. Use this retainer when OEM-style steel retainers are preferred for SPR-TS1015 installations in the specified Miata setup.
Supertech Steel Retainer for SPR-TS1015 Mazda Miata 6 Degree
