Brian Crower Spring & Retainer Kit for Mitsubishi 4G63/EVO 8/9 Single Spring ...

Brian Crower Spring & Retainer Kit for Mitsubishi 4G63 / EVO 8/9 Upgrade valve control with the Brian Crower Single Spring & Steel Retainer Kit, engineered specifically for the Mitsubishi 4G63 / EVO 8 and 9 engines. Designed for high-rev performance, this kit delivers reliable spring rates and lightweight steel retainers to improve valve stability and durability under extreme conditions. Application: Mitsubishi 4G63 / EVO 8 & 9 Includes: Precision valve springs and hardened steel retainers Performance: Increased resistance to valve float at high RPM, consistent spring pressure Durability: Heat-treated components for long service life in boosted and high-performance engines Fitment: Direct fit for stock and upgraded cylinder heads — ideal for street, track, and race builds Whether building a high-rpm street engine or a race-motivated turbo motor, this Brian Crower kit provides a balanced combination of strength, reliability, and OEM-style fitment. Trust Brian Crower for precision-engineered valvetrain components that keep your 4G63 performing at its peak.