Wiseco Pistons K2780 Forged Piston Kit 3.937" Bore 10:1 Compression Twin Cam

The Wiseco K2780 is a complete forged piston kit designed for Harley-Davidson Twin Cam engines, delivering 1596cc displacement with a 3.937-inch bore and 10:1 compression ratio. This performance kit features domed pistons with valve reliefs and includes all essential components for a professional top-end rebuild or overbore application.

Complete Kit Includes:

• Forged aluminum pistons with domed design and -6.5cc head volume
• Pre-gapped piston rings with 3mm oil control rings
• Wrist pins and circlips
• Top-end gasket set for complete installation

Key Specifications:

• Bore Size: 3.937 inches (100mm)
• Stroke: 4.000 inches
• Displacement: 1596cc (97ci actual)
• Compression Ratio: 10:1
• Piston Style: Domed with dual valve reliefs
• Material: Forged aluminum construction

Wiseco pistons are manufactured in the USA using state-of-the-art forging processes and precision CNC machining. These lightweight, high-strength pistons feature optimized designs that improve engine efficiency while maximizing torque and throttle response. The forged construction provides superior durability for demanding riding conditions, making them ideal for both performance street applications and racing use.

This kit represents an oversized bore application (0.187-inch oversize) and requires proper cylinder machining for installation. The 3mm oil control rings provide excellent oil management and long-term reliability in high-performance applications.