PISTON KIT HARLEY 4.247" SET/2, WOSSNER K8858DA800-2 DAVIDSON, ROAD

This Wossner piston kit is designed for Harley-Davidson Twin Cam engines upgraded to a Big Bore 124 cu. in. configuration, covering model years 1999 to 2012. With a standard bore size of 4.247" and a domed 10:1 compression ratio, the kit ensures high durability and optimal thermal efficiency. Manufactured in Germany, the kit includes two forged pistons along with rings, clips, and pins.

Features

• Forged high-performance pistons with skirt coating

• Engineered for efficient heat transfer from combustion chamber to cylinder walls

• Elliptical design provides a uniform bearing surface under heat expansion

• Evenly distributes thrust loads and reduces localised pressure

• Helps prevent piston collapse during high-stress engine operation

• Includes pistons, rings, clips, and pins

Specifications

• Bore size: 4.247"

• Size: Standard

• Compression ratio: 10:1

• Dome type: Domed

• Quantity: Kit includes 2 pistons

• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Wossner K8858DA800-2

• 56-W9974.000.WO

Vehicle Fitments

• Harley-Davidson Twin Cam Big Bore (124 cu. in.) 1999–2012