These Speedy pushrods can be both installed and removed easily. The Rocket Cams design permits a simple, trouble free installation that does not require removal of the gas tank, rocker assemblies, or even the rocker box cover! The threaded adjuster screws into the pushrod until the threads disengage and the adjuster simply slides into the pushrod, making installation or removal a snap. Super strong chromoly steel reduces pushrod flex. Works with stock and aftermarket cams.