12v Milled Rockers will make your head stud install a snap! Ultra-Precision machined to exacting tolerances, there are none better available anywhere! These machined remanufactured rockers are disassembled, cleaned, inspected, machined, cleaned again, assembled with genuine Royal Purple assembly lube, and shipped to your door. They arrive COMPLETELY ready for installation! Want the highest precision milled 12v rockers available for your build? Look no further for 12v rockers than from Holy Performance, available now at THD!