10 Degree 11/32" -0.030" Install Height Chromoly Valve Locks Keepers They distribute the ever-increasing valve

They distribute the ever-increasing valve spring loads over the retainer better than typical 7 degree locks by reducing the chance of "pull-through" failure

but not included

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Speedmaster billet aluminum spacers provide the benefits of an open carburetor spacer

10 Degree 11/32" -0.030" Install Height Chromoly Valve Locks Keepers They distribute the ever-increasing valveSpeedmaster valve locks are wider angled 10 degree locks. They distribute the ever increasing valve spring loads over the retainer better than typical 7 degree locks by reducing the chance of "pull through" failure. They are machined from chromoly steel, heat treated for maximum strength, and designed with a 10 degree taper. The Speedmaster valve locks will fit any Speedmaster 10 degree retainer and are recommended for all race applications due to