COMP Cams Valve Spring Performance GMWith a . 600" maximum lift, these Beehive Valve Springs were designed for hydraulic Roller cams. COMP Cams Beehive Valve Springs deliver increased valve train stability and a much lighter valve train. This is achieved with less spring pressure for better valve control and reduced weight of both the spring and retainer. The unique Beehive shape handles valve train stress more efficiently to eliminate damaging harmonics and increases high RPM horsepower