What is the purpose of a valve spring seat?

A valve spring seat, like this one from COMP Cams, protects your cylinder head and any shim underneath it from the high pressures exerted by the valve spring. It also helps to center the spring and keep it from shifting during operation.

What material is this valve spring seat made from?

This valve spring seat is constructed from a hardened steel alloy. This material is chosen for its ability to withstand the extreme pressures and high RPMs found in performance engine builds.

Does this part require cylinder head machining?

Unlike older style external locating cups, this COMP Cams ID locator uses an inboard shoulder. This design generally requires less cylinder head machining to install properly.

COMP Cams Valve Spring Seat 4690-1

Name: COMP Cams Spring Seat.120 X .780 X .878
Brand: COMP Cams
SKU: comp-cams-comp-cams-spring-seat-120-x-780-x-878-t14-4392266
Price: 11.95 USD
Availability: BackOrder

COMP Cams Spring Seat.120 X .780 X .878

$11.95

On Backorder

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

COMP Cams valve spring seat. Protects your cylinder head and shim from extreme spring pressures and high RPMs.

Key Features

Fits COMP Cams 26918 beehive valve springs.
Made from hardened steel alloy for durability.
Protects cylinder head and shim from extreme spring pressures.
Features an inboard locating shoulder to center and hold the valve spring.
Designed to prevent spring shifting at high RPMs.
No extensive cylinder head machining required for installation.

⚠️ 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

If you're building a performance engine that will see high RPMs or use stiff valve springs, you need to protect your cylinder head and ensure the spring stays centered. Standard shims just won't cut it under those kinds of pressures. COMP Cams offers a well-built solution with their valve spring locators.

These aren't just simple shims; they're made from a hardened steel alloy that acts as a solid seat. This seat not only shields the cylinder head and any shim underneath it from the intense forces of the valve spring, but it also provides an inboard locating shoulder. This shoulder helps center the spring and keeps it firmly in place, preventing it from shifting even under extreme conditions. This design means you don't need to machine the cylinder head as much as with older style external locating cups.

This particular locator, part number 4690-1, has a 1.253" outer diameter and fits well with COMP Cams' 26918 beehive valve springs. It's a small but important piece for ensuring the longevity and proper function of your engine's valvetrain.