Manley Tensile Max Steel valve spring retainers are designed for serious engine builders. They're as light as standard titanium retainers and within 2 to 4 grams of lightweight titanium versions. The tough alloy retainers are specially heat-treated to provide a hardness of Rc 52-54 and prevent retainer wear. Manley's exclusive process yields a part that delivers optimum balance between ultimate strength, fatigue strength, hardness, and ductility. A unique impingement process developed specifically for the Tensile Max alloy and hardness range improves fatigue strength and promotes better oiling between the engine valve spring and retainer. They are available in a variety of sizes, individually or in larger sets.

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