Describe: BRAND NEW OE # 93-5120 Feature revoary design - allows quicker, easier installation without the removal of the rocker covers .4375” diameter Chromoly steel 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 and adjusted, the lock nut prevents the adjuster from moving. The ball ends of the pushrods are drilled so that oil can flow through the pushrod. NOTE: Especially for use with evo style hydraulic tappets. Will not work with Solid Lifters. .