Wiseco SK1373 Forged Snowmobile Piston Kit

The Wiseco SK1373 is a forged performance piston kit engineered for the extreme demands of snowmobile racing, including snocross and cross-country competition. Wiseco has spent decades developing snowmobile-specific forged pistons in the USA, giving racers a proven advantage on the most demanding courses.

What sets Wiseco apart is their fully integrated, end-to-end manufacturing process. All pistons are forged in-house, and all forge tooling is produced domestically — allowing Wiseco to control every step from raw bar stock to finished, skirt-coated parts. In-house dyno testing drives continuous innovation in piston shapes, coatings, and components, keeping Wiseco at the forefront of motorsport piston technology.

Why Forged Over Cast?

• Superior strength-to-weight ratio — each forging is designed to maximize performance without unnecessary mass
• Condensed, aligned grain structure — produces higher mechanical properties and superior resistance to impact and fatigue
• Tougher and more durable than cast pistons under high-performance motorsport conditions
• Resistant to catastrophic failure — unlike brittle cast pistons, forgings deform predictably when material limits are approached
• State-of-the-art skirt coatings — reduce friction and improve durability in high-RPM, high-stress applications

The SK1373 piston kit is purpose-built for riders who demand race-proven reliability and performance. Wiseco's vertically integrated design, testing, and manufacturing process ensures that every kit meets strict quality standards and delivers consistent results from the first lap to the last.