Wiseco 4 Stroke Forged Series Piston Kit, 3.885 IN Bore, 10.5:1 CR

The Wiseco 40186P1 is a high-performance forged piston kit designed for Harley Davidson Twin Cam 103 engines. Wiseco pistons are engineered for durability and performance, featuring a high-performance ring kit, alloy pin, and dedicated forgings crafted from aerospace alloy for superior strength-to-weight ratio. They are precision manufactured and forged in the USA, with a race-ready dome finish for optimal combustion flow. Key features include horizontal slot-pin oiling for reduced friction and scuff resistance, a pressure seal groove for maximum ring seal, and an Armor Glide skirt coating for race applications to further reduce friction and noise, ultimately contributing to increased horsepower. Each piston is developed from race-proven designs.