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

The tang on a valve lock's sole purpose is to temporarily locate the valve lock, retainer, and spring until the retainer's taper can seat around the lock. This creates a 'collet' effect that secures the components.

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

It's critical that the valve locks match your valve stem size. If the two halves of the lock fit together without a gap when seated, they are too large. If they fit tight to the stem but 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 engines with heavy valve springs?

These hardened steel street locks are recommended for street applications with lighter valve spring loads. They are not intended for engines with very high spring pressures, such as those exceeding 1000 lbs.

COMP Cams Valve Locks 7 Degree 3/8" Stem 606-16

Name: COMP Cams Valve Lock Kit 602 & 604 (8 P
Brand: COMP Cams
Price: 24.06 USD
Availability: InStock

COMP Cams Valve Lock Kit 602 & 604 (8 P

$24.06

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 hardened steel street valve locks. 7 degree angle, 3/8" stem size, 2 and 4 groove. Part# 606-16. Direct fit.

Key Features

Fits a wide range of Chrysler and Dodge vehicles from 1959-1978.
Hardened steel construction for street applications.
Designed for 3/8" valve stem size.
Features a 7-degree lock angle.
Includes both 2 and 4 groove lock designs.
Intended as a replacement for stock engine rebuilds with lighter valve spring loads.

⚠️ 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

COMP Cams is well-known for performance engine components, and these hardened steel street valve locks are a solid option for stock engine rebuilds. They are designed to replace your original valve locks and are specifically made for street applications where valve spring loads aren't excessively high. It's really important that your valve locks match your valve stem size exactly; too large and they won't seat properly, too small and they won't provide the necessary support. These locks feature a 7-degree angle and are sized for a 3/8-inch valve stem, making them a direct replacement for many Chrysler and Dodge vehicles from the late 50s through the late 70s, like the Dodge Charger or Chrysler New Yorker.

These locks are made from hardened steel for durability in street use. The design includes both 2 and 4 groove options, offering versatility. While the tang on the lock helps temporarily position the retainer and spring, the primary function of holding everything in place comes from the retainer's taper creating a 'collet' effect around the lock as spring pressure increases. This design ensures a secure fit under normal operating conditions.