Manley Performance Valve spring and Retainer Kits take the guess work out of making your valvetrain race-ready. Engineered for maximum durability, stability, and precision in high-performance and racing applications, these chrome-silicon alloy springs provide exceptional fatigue resistance and high-tensile strength, ensuring consistent valve control at extreme RPMs. Save time and money with these kits, featuring premium springs, retainers, designed to handle aggressive aftermarket camshafts.. Includes matched Valve Springs, Retainers, and Locks (if part number ends in "K"). Spring Locators included in some applications.Designed to handle aftermarket camshafts and up to 10,000 RPMHeat treated aerospace grade titanium retainers CNC machined to exacting tolerancesIncludes 7? Machined Valve Locks manufactured from the premium quality heat treated steel. Manley 90-06 Mitsubishi 4G63-4G63T DSM / EVO DOHC 16 Valve Spring and Retainer Kit (w/ Valve Locks). Max Lift: .580? - Spring: 22125-16 - Titanium Retainer: 23125-16 - Valve Lock: 13016-8. Manley Sprng/Retnr Kit - Mitsubishi 4G63 DSM / EVO (90-06) - Locks Included. Manley Sport Compatct Valve Spring and Retainer Kit. 90-06 4G63 Vlv Sprng Kit. Engine Valve Spring Kit. Valve Spring Kit-SC

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