The clutch kit for real-world trail riding; improves efficiency and performance. Pull harder out of corners. Exceptional backshift characteristics keep engine in the powerband to keep power on tap. Durable, high-quality helixes have been tested in varying conditions to provide optimal performance. Won't reduce engine reliability. Includes instructions. For additional performance gains, use of traction products is recommended. Kit designed for 0' to 2,000' altitude. Ski-Doo applications not for models with Rotax Electronic Reverse unless designated RER in model name..