This Straightline Performance clutch kit is calibrated for Arctic Cat Catalyst 600 snowmobiles ridden above 6,000 feet, where thinner air changes engine output and makes accurate clutch calibration essential. The kit pairs billet-machined adjustable weights with a custom mountain helix, letting you fine-tune RPM and power delivery as snow conditions or engine modifications change.

Along with the weights and helix, the kit supplies a matched primary and secondary spring set plus adjustment hardware, installation instructions, and a tuning guide. The combination is built to sharpen backshift, hold target RPM, and keep the belt working efficiently on steep climbs, deep powder, and long mountain pulls.