Manley 90-99 Mitsubishi 4G63-4G63T DSM DOHC 16 Valve Spring and Retainer Kit (w/ Valve Locks)

If you're rebuilding the top end of your 1990-1999 Mitsubishi Eclipse, especially if you're planning on aggressive aftermarket camshafts or pushing your engine to higher RPMs, a quality valve spring and retainer kit is essential. This kit from Manley Performance is designed to give you the stability and control needed for demanding engine builds.

Manley uses chrome-silicon alloy for their springs, which offers excellent resistance to fatigue and high tensile strength. This means the springs will maintain consistent pressure and control over the valves, even at extreme engine speeds, helping to prevent valve float. The kit includes heat-treated, aerospace-grade titanium retainers that are CNC machined for precise fitment, and also comes with machined valve locks made from heat-treated steel. This combination ensures durability and reliability for high-performance applications, supporting lifts up to .460 inches and potentially up to 10,000 RPM.

This kit takes the guesswork out of selecting compatible valvetrain components. It includes matched valve springs, retainers, and valve locks, all designed to work together seamlessly. Having these components ready in one package saves you time and ensures you have the right parts for a successful engine build.