Déjà vu. Our 600cc Polaris Liberty engine with variable exhaust drilled every competitive 700cc powerplant at the American Snowmobiler Magazine 2001 Port-A-Tree Shoot-Out. For 2003 we’re raising the bar yet again by placing the sport’s leading 600cc engine into our lighter, better-handling, and tougher PRO X chassis. Lighter weight saddle-less composite skis are standard on all PRO X models. The 9.2" of front and almost 14" of rear travel are paired with durable Ryde FX shocks with external compression adjustment. Even the rivets on Polaris sleds are tougher, as the self-piercing design is 200% stronger than conventional rivets. Premium materials designed by people who live snowmobiling, and rigorous testing keep you and your 600 PRO X out front mile after mile.