Built for serious racers, the Straightline Performance Ski-Doo 600RS Snowcross Race Clutch Kit delivers championship-level clutch performance for 129-137 inch track applications. Featuring Straightline's proven adjustable P-Drive weight kit, custom race tuning fin, and a specially calibrated primary spring, this package provides unmatched acceleration, improved holeshot performance, superior RPM control, and race-winning tunability. Utilizing the proven factory secondary helix and spring combination, Straightline provides tested baseline settings to get racers on track quickly and efficiently.