The Brian Tooley Racing .650 beehive valve spring kit SK024 is engineered for 6.2L and 6.4L HEMI engines that require improved valvetrain stability when running performance camshaft profiles. The beehive spring design reduces retainer mass while maintaining consistent spring pressure across the RPM range, helping control valve motion and reduce the risk of valve float. Ideal for naturally aspirated and performance street builds, these springs are designed to support higher lift camshafts while maintaining durability when installed and set up correctly. Developed using BTR's proven valvetrain engineering, this kit delivers reliable performance for modern HEMI applications.