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.

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

• 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)
• 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
• 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)
• Viton Valve Stem Seals offer exceptional resistance to heat, chemicals, and oils. Seal No. 24042-16
• Note: Max. lift figures above may vary depending upon the cylinder head and installed height.