What is the installed height for these valve springs?

These Manley valve springs are designed for a 1.324 inch installed height. It's important to ensure your cylinder heads are set up for this specific height when installing them.

Are these springs suitable for stock camshafts?

These springs are intended for higher-lift camshafts, typically .800 inches or more. Using them with a stock camshaft may be overkill and could lead to incorrect valvetrain geometry.

What does the 'double' in the product name refer to?

The 'double' indicates that each valve uses two springs working together. This design offers better dampening and stability compared to a single spring, especially at higher engine speeds.

Specifications

Brand: Manley Performance
Part #: 221421-1

Manley Chevrolet LS1 And LT1 .800 Lift Valve Spring -1.324 Double (Single)

Name: Manley Chevrolet LS1 And LT1 .800 Lift Valve Spring -1.324 Double (Single)
Brand: Manley Performance
SKU: manley-performance-manley-chevrolet-ls1-and-lt1-800-lift-valve-spring-1-324-doub-t14-803051
Price: 33.93 USD
Availability: BackOrder

$33.93

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Manley Chevrolet LS1 and LT1 .800 lift valve spring. For high-lift camshafts.

Key Features

Fits Chevrolet LS1 and LT1 engines.
Designed for camshafts with up to .800 inches of lift.
Double spring design for improved stability.
1.324 inch installed height.
Manley Performance brand.

⚠️ 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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About this part

Product Details

If you're building a performance LS1 or LT1 engine and planning to use a camshaft with more lift, you'll need valve springs that can keep up. These double valve springs from Manley are designed to handle the demands of higher lift profiles, ensuring your valvetrain stays stable at higher RPMs.

Manley has a solid reputation for making well-built engine components, and these springs are no exception. They are built to work with camshafts up to .800 inches of lift, which is a significant amount. The double spring design offers more stability and better dampening than a single spring, helping to prevent valve float when you're really pushing the engine. This particular set is a single spring, meaning you get one spring per valve, and it's designed for a 1.324 inch installed height.