A direct replacement Beehive valve spring for the 4.6L and 5.4L 2 and 3 valve, engines with 550"maximun lift. COMP CamsÆ Beehiveô Valve Springs have increased valve train stability. It's a result of having less spring pressure for better valve control and reduced weight of both the spring and retainer. Valve train can handle more RPM and more aggressive cam profiles.