Wiseco 64.5mm Piston Ring Set for Ski-Doo Formula III 600 1996-1999 2539CD

Piston ring degradation is one of the most common causes of compression loss and power deterioration in high-mileage Ski-Doo Formula III 600 engines. The Wiseco 2539CD ring set restores proper ring-to-cylinder wall sealing, eliminating blow-by and maximizing combustion efficiency—critical for both competitive sled racing and reliable backcountry performance. This precision-engineered replacement ensures your engine maintains peak horsepower and throttle response without compromise.

Wiseco's rings are manufactured from premium materials with tight tolerances, designed to handle the extreme pressures and temperature swings inherent to 2-stroke snowmobile engines. Installation is straightforward for experienced mechanics, and the lightweight construction contributes to reduced reciprocating mass for quicker engine response.

• Bore diameter: 64.5mm
• Fits one piston
• Vehicle fitment: Ski-Doo Formula III 600 (1996-1999)
• MPN: 2539CD
• Premium ring materials
• Precision-engineered tolerances
• Restores compression sealing
• Improves combustion efficiency
• Reduces blow-by losses
• 2-stroke engine optimized
• Bolt-on installation
• High-mileage engine rebuild essential