What is the primary function of a valve lock?

The primary function of a valve lock is to temporarily position the valve retainer and spring until the retainer's taper can nest around the lock. This creates a collet effect that securely holds the retainer and lock in place under spring pressure.

How do I know if I have the correct size valve locks?

When properly positioned on the valve stem, there should be a small gap between the two halves of the lock. If the halves fit together without a gap, they are too large. If they fit too tightly and leave a gap between the middle of the lock and the stem's outer diameter, they are too small.

Are these valve locks suitable for high-performance racing engines?

These valve locks are recommended for street applications with lighter valve spring loads. They are not intended for high-performance racing engines that experience very high spring loads exceeding 1000 lbs.

COMP Cams Valve Locks 11/32in Single Groove 601-12

Name: COMP Cams Valve Locks 11/32in Single Groove
Brand: COMP Cams
Price: 17.95 USD
Availability: InStock

COMP Cams Valve Locks 11/32in Single Groove

$17.95

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 Locks 11/32in Single Groove. Hardened steel street locks for stock engine rebuilds.

Key Features

Fits 128+ vehicle make/model combinations.
Set includes 12 pairs of hardened steel street locks.
Features a 7-degree angle and 11/32-inch valve stem size.
Designed as a direct replacement for stock engine rebuilds.
Recommended for street applications with lighter valve spring loads.
Single groove design.

⚠️ 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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Will this fit your vehicle?

Product Details

COMP Cams is well-known for performance engine parts, and these single groove valve locks are a solid option for your next engine build. They are designed as a direct replacement for stock engine rebuilds, fitting a wide range of vehicles from classic muscle cars like the Chevrolet Camaro and Chevelle to more modern trucks and SUVs like the Chevrolet Astro. These locks are made from hardened steel and feature a 7-degree angle with an 11/32-inch stem size, making them a precise fit for many factory applications.

It's important to get the right size valve locks for your engine. If the two halves of the lock fit together without a gap when properly positioned on the valve stem, they are too large. Conversely, if they fit too tightly and leave a gap between the middle of the lock and the stem's outer diameter, they are too small. These street locks are recommended for applications with lighter valve spring loads, ensuring proper function and longevity in typical street use.

Remember that the tang on a valve lock's purpose is primarily for temporary positioning. The real holding power comes from the retainer's taper nesting around the lock, creating a collet effect that binds them together under spring pressure. This set includes 12 pairs of these single groove, 7-degree locks.