This Schumacher Racing Products slipper spring is a factory replacement part for the slipper clutch assembly on compatible Schumacher 1:10 buggies including the CAT K1 Aero, CAT L1 Evo, and Cougar KR platforms. The metal coil spring maintains correct slipper clutch tension, helping the drivetrain deliver consistent power transfer. Replacing a worn or damaged slipper spring restores proper clutch slip characteristics and protects drivetrain components. Features: Metal coil construction Direct factory replacement for slipper clutch assembly Compatible with multiple Schumacher 1:10 buggy platforms 7/7/26 cs