Valve Spring Kit

Manley Performance LS & LT NexTek® valve spring 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 all-inclusive kits, featuring premium springs, retainers, I.D. locators, locks, and Viton? seals.

Additional Information

Max Lift: 0.660" - 10° Tool Steel Retainer (+.050") - I.D. Spring Locator (.505") - 10° Machined Valve Lock - Viton Valve Stem Seals

Part Type

Engine Valve Spring Kit

• 10 Lightweight Tool Steel Retainers have been heat treated to a hardness of Rc 56 and are only 2-4 grams heavier than Titanium versions. Retainer No. 23616TS-16 (+.050" Installed Height)
• 10 Machined Valve Locks use the highest quality steel alloy and are heat treated and black oxide finished. For 8mm (.3135") valve stem. Lock No. 13153-16
• I.D. Valve Spring Locator is CNC machined, heat treated, and black oxide finished. Locator No. 42334-16 (.505" ID)
• Manley LS and LT Valve Spring Kits provide a complete, engineered solution, ensuring seamless compatibility for higher-lift camshafts and eliminating concerns with mismatched components.
• NexTek Valve Springs are manufactured from "super clean" Hi-Tensile Chrome Silicon steel and shot-peened to MIL spec for maximum fatigue life. Spring No. 221436-16
• Note: Max. lift figures above may vary depending upon the cylinder head and installed height.
• Viton Valve Stem Seals offer exceptional resistance to heat, chemicals, and oils. Seal No. 24042-16

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Reference Information

Valve Spring and Retainer, NexTek, Dual, 8mm Stem Diameter, 10 Degree Lock, 1.295 in. Spring O.D., Kit

Manley NexTek valve spring and retainer kits are designed and manufactured for optimum consistency, run after run, lap after lap. They are manufactured from super clean high-tensile chrome silicon steel that has been shot peened to MIL specs for maximum fatigue life. Proven to have less load loss than many other springs, they exhibit superior fatigue life and enhance valvetrain stability--everything that counts in winning races!