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Locks Keepers, Hardened 5/16" X 7 Degree, .030" Down Locks

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Product Description

Down locks will produce .030" LESS Installed height the std locks

Hardened Single Groove Down Locks

Application: 5/16" Applications


These are sold in half sets of 16 halves which is enough for 8 valves. If you need enough for 16 valves, simply order quantity of two.


Down locks are designed to offer LESS installed height.

We offer two different versions of down locks. These are the .030" version.

The main reason to use down locks is when there is way too much installed height w/ Std locks and the installer doesn't want a tall stack of shims.

Some applications have a stepped spring base which only accept a certain amount of shims before the step is lost. These applications need the step to locate the spring so down locks are the best choice.

Many Ford applications use a stepped spring base.

Specially manufactured for added strength, these Down locks are great for most any performance single groove 5/16" valve application in need of lowering the installed height.

If you look at the pictures, you can see the locator bead is offset upward.



  • Made in the USA
  • Green Surface Finish
  • Hardened to Resist Wear
  • 7 Degree Lock Angle
  • Aproximately .030" less installed height (see *note below)
  • Single Groove Square Bead
  • Comes with 16 halves.
  • Enough for one 8 valve engine.


Alex's Parts- The smart choice in valve train parts~

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