This Schumacher Racing Products factory replacement FAB spring is designed for the Cat PB 4x4 buggy slipper clutch assembly. The metal coil spring maintains correct slipper clutch preload, helping to protect the drivetrain under hard acceleration and landings. Replacing a worn or damaged spring restores consistent slipper performance to factory specification. Features: Metal coil spring construction Slipper clutch preload component Designed for Cat PB 4x4 drivetrain 7/7/26 cs