What is the purpose of a valve spring seat?

A valve spring seat sits at the bottom of the valve spring, providing a stable and flat surface for the spring to rest against within the cylinder head. This ensures the spring is properly supported and can exert the correct pressure.

What does the 1.340 inch inner diameter refer to?

The 1.340 inch inner diameter is the measurement of the hole in the center of the spring seat. This dimension is critical for matching the seat to the specific valve spring you are using to ensure a proper fit.

Are these valve spring seats compatible with all valve springs?

These seats are designed to fit Manley valve springs and have a specific inner diameter of 1.340 inches. It's important to verify that this size matches the valve springs you intend to use for proper installation and function.

Specifications

Brand: Manley Performance
Part #: 42348-16
UPC: 807298063232

Manley Valve Spring Seat, SPRING CUP-ID 1.340

Name: Manley Valve Spring Seat, SPRING CUP-ID 1.340
Brand: Manley Performance
SKU: manley-performance-manley-valve-spring-seat-spring-cup-id-1-340-t14-881635
Price: 112.96 USD
Availability: BackOrder

$112.96

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Manley Performance valve spring seats. These seats are essential for proper valve spring installation.

Key Features

Fits Manley valve spring sets.
Inner diameter measures 1.340 inches.
Designed to provide a solid base for valve springs.
Helps maintain correct valve spring installed height and pressure.
Sold as a set of 16, suitable for most V8 engines.
Manley Performance is a well-known brand for engine components.

⚠️ 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

Manley Performance is well-known for making strong internal engine components, and these valve spring seats are no exception. They are designed to sit at the base of your valve spring, providing a solid foundation for the spring to rest on. This ensures the spring is properly supported and can function as intended within your engine's cylinder head.

These particular spring seats have an inner diameter of 1.340 inches, a common size for many performance and stock applications. Having a well-made seat is crucial because it helps maintain the correct installed height and pressure of the valve spring. This is important for keeping your valves sealing properly under all operating conditions, from idle to high RPMs.

When you're rebuilding an engine or upgrading your valvetrain, using reliable components like these Manley spring seats is key to a successful build. They are sold in a set of 16, which is typically what you'll need for a complete V8 engine.