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The Supertech titanium retainer for SPR-TS1015 is sized for Mitsubishi Evo X 5.5mm valve stems with a 7-degree seat; it matches that specific stem and seat geometry. Use it as a direct replacement when servicing Evo X valvetrains, replacing worn retainers, or performing head work that requires the SPR-TS1015 profile for 5.5mm stems.
Supertech Titanium Retainer for SPR-TS1015 Mitsubishi Evo X 5.5mm Stem 7 Degree
