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The Brian Crower single valve spring and steel retainer kit for Mitsubishi 4G63 engines used in Evo 8 and 9 provides a direct replacement for stock valve springs and retainers. Specified for these Evolution platforms, the kit restores proper valve control during higher RPM use, making it suitable for engine rebuilds or moderate tuning where OEM fitment and dependable spring pressure matter.
Brian Crower Mitsubishi 4G63/EVO 8/9 Single Spring & Steel Retainer Kit
