Threaded adjuster screws into the pushrod until the threads disengage and the adjuster simply slides into the pushrod making installation or removal a snap.
Once the pushrod is installed or adjusted, the locknut prevents the adjuster from moving.
Ball ends of the pushrods are drilled in all versions except those for use with stock shovelhead rocker arms so that oil can flow through the pushrod.
Designed for use with Evolution and Twin Cam 88 style hydraulic tappets. They are not compatible with stock or aftermarket Shovelhead hydraulic tappet or most solid style tappets.