What is the purpose of the tang on a valve lock?

The tang on a valve lock is not designed to hold the retainer and valve spring in place under high load. Its sole purpose is to temporarily locate these components relative to the valve until the retainer's taper can nest around the lock, creating a secure collet effect.

How do I know if these valve locks are the correct size?

It is critically important that valve locks match the valve size. If the two halves of the lock fit together without a gap, they are too large. If they fit tight to the stem and leave a gap between the middle of the lock and the outer diameter of the stem, they are too small.

Are these valve locks suitable for high-performance engines?

These valve locks are recommended only for street applications with lighter valve spring loads. They are designed for milder spring loads and may not withstand the extreme forces found in high-performance or racing engines.

COMP Cams Valve Locks 11/32in Single Groove 601-16

Name: COMP Cams Valve Locks 11/32in Single Groove
Brand: COMP Cams
Price: 25.31 USD
Availability: InStock

COMP Cams Valve Locks 11/32in Single Groove

$25.31

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 for 11/32in single groove valves. Set of 16 hardened steel keepers for stock engine rebuilds.

Key Features

This product includes 16 pairs of hardened steel street locks.
Each lock features a single groove and a 7-degree angle.
Designed for valves with an 11/32-inch stem diameter.
Suitable for stock engine rebuilds and street applications with lighter valve spring loads.
The locks are stamped and then hardened for durability.
Proper fitment is critical; locks should not have a gap between their halves when installed.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

This product includes a set of 16 hardened steel valve locks, designed for single groove valves with an 11/32-inch stem diameter and a 7-degree lock angle. These are intended as a direct replacement for stock engine rebuilds and are suitable for street applications with lighter valve spring loads. It's important to ensure the valve locks match your valve size precisely; if the two halves fit together with no gap, they are too large, and if they leave a gap between the middle of the lock and the stem's outer diameter, they are too small.

The primary function of the tang on a valve lock is to temporarily position the lock, retainer, and spring until the retainer's taper can seat around the lock. This creates a collet effect that securely binds the components together. The force exerted by the valve spring as the valve opens actually increases this binding effect, keeping the retainer and lock firmly in place. These locks are stamped and then hardened for durability in milder street applications.