Wiseco SK1318 Forged Piston Kit for Arctic Cat Snowmobile - 2-Stroke 81.00mm

The Wiseco SK1318 is a precision-matched and balanced 2-stroke forged piston kit designed for Arctic Cat 800cc twin-cylinder snowmobile engines. Featuring an 81.00mm standard bore, this kit delivers the strength and durability demanded by high-performance snocross and cross-country riding applications.

What's Included:

• Forged aluminum piston(s)
• High-quality piston ring(s)
• Wrist pin(s)
• Circlips
• Top end gasket set

Key Features:

• USA-forged construction — engineered, forged, and machined in Mentor, OH using aerospace-grade aluminum
• Optimized grain structure — the forging process compresses and aligns the material's molecular grain flow, producing superior impact resistance, fatigue resistance, and tensile strength compared to cast alternatives
• Strength-to-weight optimization — dedicated forgings with precision lightening operations deliver maximum power without unnecessary mass
• Race-proven design — developed using 3D CAD and finite element modeling software for application-specific performance
• Skirt coating — factory-applied skirt coating reduces friction and improves break-in
• Precision matched and balanced — pistons are matched and balanced as a set for smooth twin-cylinder operation

Wiseco has been manufacturing forged pistons for over 80 years, making them the only major U.S. aftermarket piston brand that exclusively uses the forging process. The SK1318 kit provides everything needed for a top-end rebuild or overbore in a single purchase. Note: Cylinder sleeve(s) must be purchased separately.