Wiseco 4574M07550 75.50mm 11:1 Forged ATV Piston Kit

The Wiseco 4574M07550 is a high-performance forged piston kit engineered for ATV applications, featuring a 75.50mm bore diameter and an 11:1 compression ratio. Manufactured entirely in the USA, this piston kit is built to handle the extreme demands of high-performance motorsport use.

Why Forged Over Cast?

Wiseco forged pistons are significantly stronger and more durable than standard cast pistons. Cast pistons lack defined grain structure and are prone to catastrophic failure when material yield strength is exceeded. Wiseco forgings feature a condensed, aligned grain structure that follows the geometry of the part, delivering superior mechanical properties, impact resistance, and fatigue resistance.

Key Features:

• 75.50mm bore diameter for precise fitment
• 11:1 compression ratio for enhanced power output
• 100% USA-forged construction for maximum strength-to-weight ratio
• All forge tooling produced in-house in the USA for strict quality control
• Skirt coating applied for reduced friction and improved wear resistance
• Designed for ATV performance applications
• Tougher and more durable than OEM cast alternatives
• Optimized grain structure resists impact and fatigue under racing conditions

Wiseco controls every stage of the manufacturing process — from raw bar stock to finished, skirt-coated parts — ensuring consistent quality and performance in every kit. The Wiseco 4574M07550 piston kit is the ideal upgrade for riders looking to restore or increase engine performance in their ATV.