Brian Crower Valve Springs And Retainers Kit (Nissan Patrol TB48) BC0250Brian Crower Valve Springs And Retainers Kit High Performance Valve Spring and Retainer Kit for Nissan Patrol TB48 (BC0250) Part #: BC0250 Overview The Brian Crower Valve Springs and Retainers Kit is engineered for enthusiasts seeking to enhance their Nissan Patrol TB48 engine's performance at high RPMs. Designed with precision and durability in mind, this kit ensures your engine can handle increased valve lift and higher operating speeds without