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Brian Crower titanium valve spring retainers for Mitsubishi 4B11 (Evo X) applications are aftermarket retainers intended to secure valve springs in high‑rpm or high‑stress engine builds. Titanium construction provides a lightweight alternative to steel retainers, helping reduce valvetrain reciprocating mass where builders require durable retainers matched to the 4B11 Evo X platform.
Brian Crower Mitsubishi 4B11 Evo X Titanium Retainers
