Get everything you need to optimize your heads for high-lift cam and high RPM setups! Our kit includes top-notch Single Hi-Performance Valve Springs, durable Chromoly Retainers, and reliable Hardened Valve Locks. Enjoy the same performance as P/N: 4040 and unleash your engine's potential today!

High-Rev. Single Spring Kit

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  • $67.43
  • $80.91
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Everything you need to prepare your heads for high-lift cam use and high RPM applications. Kits include Single Hi-Performance Valve Springs, Chromoly Retainers and Hardened Valve Locks. Same Single Springs as P/N: 4040.