Crane Energizer roller rockers give you the features a good roller rocker should have for about the same price as stock-style stamped rocker arms. The main body is made from vacuum die-cast aluminum alloy for extra strength. The needle-bearing, full-roller fulcrum assembly provides reduced friction and wear. And with a wide contact roller tip and a heat-treated steel pushrod cup, you get reduced valve stem and pushrod seat wear. NOTE: specs & photos may vary