Wiseco SK1320 Arctic Cat Twin Standard Bore Forged Piston Kit

The Wiseco SK1320 is a standard bore forged piston kit engineered for Arctic Cat twin-cylinder snowmobile engines. Wiseco has spent decades developing forged snowmobile pistons specifically for the demands of snocross and cross-country racing, and this kit reflects that deep engineering expertise.

Unlike cast pistons, Wiseco's forged pistons are manufactured entirely in-house in the USA — from raw billet to finished, skirt-coated parts. This end-to-end control over the manufacturing process ensures every piston meets exacting quality and performance standards. In-house dyno testing further allows Wiseco to refine piston geometry, coatings, and component design through rigorous research and development.

Why Forged Over Cast?

• Superior grain structure — Forgings feature a condensed, aligned grain that follows the contours of the part, producing higher mechanical strength and resistance to impact and fatigue
• Increased toughness — Unlike brittle cast pistons that can fail catastrophically when yield strength is exceeded, forged pistons flex and absorb punishment
• Optimized strength-to-weight ratio — Each forging is engineered to shed unnecessary mass while maximizing structural integrity
• Skirt coating included — Factory-applied skirt coating reduces friction and improves break-in performance
• Standard bore fitment — Direct replacement fit for compatible Arctic Cat twin-cylinder snowmobile applications
• USA forged and manufactured — All forge tooling and pistons produced domestically for consistent quality control

The Wiseco SK1320 piston kit is purpose-built for riders who demand the reliability and performance of a true forged piston in high-stress snowmobile operating conditions. Whether rebuilding a worn engine or refreshing a performance build, this kit delivers OEM-fit precision with race-proven forged construction.