COMP Cams
COMP Cams 13706-1 - 1/2" Stud Upgrade for Ultra Pro Magnum and Ultra Pro Magnum XD Rocker
COMP Cams 13706-1 - 1/2" Stud Upgrade for Ultra Pro Magnum and Ultra Pro Magnum XD RockerUpgrades 1 Rocker. See 13706-KIT for a kit that upgrades all 16 rocker arms.