What components are included in this Manley valve spring kit?

This kit comes with a complete set of Manley NexTek? valve springs, steel retainers, I.D. spring locators, machined valve locks, and Viton valve stem seals.

What is the maximum valve lift this kit can support?

This kit is designed to support a maximum valve lift of 0.660 inches. However, the actual maximum lift can vary based on your specific cylinder head configuration and installed height.

Are these parts suitable for a street-driven vehicle or just race cars?

These parts are engineered for high-performance and racing applications, offering durability and precision for demanding use. They are well-suited for street performance builds where higher lift camshafts are used.

Manley GM LS Series .660in Max Lift Valve Spring and Retainer Kit

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Specifications

Brand: Manley Performance
Part #: 26362134KS
UPC: 807298102344

Manley GM LS Series .660in Max Lift Valve Spring and Retainer Kit

Name: Manley GM LS Series .660in Max Lift Valve Spring and Retainer Kit
Brand: Manley Performance
Price: 465.22 USD
Availability: InStock

$465.22

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Manley GM LS Series .660in Max Lift Valve Spring and Retainer Kit. A complete kit for higher-lift camshafts.

Key Features

This kit includes Manley NexTek? valve springs, steel retainers, I.D. spring locators, machined valve locks, and Viton valve stem seals.
NexTek? valve springs are manufactured from "super clean" Hi-Tensile Chrome Silicon steel and shot-peened for maximum fatigue life.
Steel retainers are CNC machined from thru-hardened 4140 chromoly.
I.D. valve spring locators are CNC machined, heat treated, and black oxide finished.
Machined valve locks are made from a high-quality steel alloy, heat treated, and black oxide finished.
Viton valve stem seals offer exceptional resistance to heat, chemicals, and oils.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

This Manley Performance valve spring kit gives you everything you need to upgrade the valvetrain on your GM LS or LT engine. It's designed to handle higher-lift camshafts, taking the guesswork out of matching components for a high-performance build. You get a set of NexTek? valve springs, steel retainers, I.D. locators, machined valve locks, and Viton valve stem seals, all in one box.

The NexTek? springs are made from chrome silicon steel that's shot-peened for better fatigue life, helping them maintain consistent valve control even at high RPMs. The included steel retainers are CNC machined from 4140 chromoly, and the I.D. locators are heat-treated and black oxide finished. The machined valve locks are also made from a high-quality steel alloy. Viton valve stem seals are included to handle heat, chemicals, and oils effectively. This kit is built for durability and precision in demanding applications.

This kit is a solid option for anyone rebuilding their top end or looking to upgrade their valvetrain for more aggressive camshaft profiles. The maximum lift rating is .660 inches, but keep in mind that actual lift can vary depending on your cylinder head setup and installed height.