Behind us here you'll see the guys getting the valve lifter guides prepared to be installed and milled. The large skid of parts in the lower left is freshly cast lifter guides. In this area the guys will drill the mounting holes into these lifter assemblies, and then bore all twelve holes for each lifter. The Rickenbacker engine has a unique, 2 piece removable lifter system which is easily assessable for any maintenance work or replacement that might be needed during your ownership.