PISTON KIT HARLEY 3.882″ SET/2, WOSSNER K8857D040-2 DAVIDSON, ROAD

This Wossner piston kit is engineered for Harley-Davidson Twin Cam 88″ engines modified to a Big Bore 103 cu. in. configuration. Featuring a 3.882″ bore with a +0.015″ oversize and a 10:1 domed compression ratio, the kit delivers enhanced structural integrity and heat dissipation. Manufactured in Germany, this forged piston kit includes two pistons, rings, clips, and pins for complete installation.

Features

• Forged high-performance pistons with skirt coating

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

• Elliptical design ensures uniform bearing surface under thermal expansion

• Reduces localised pressure and evenly distributes thrust loads

• Helps prevent piston collapse under extreme engine conditions

• Includes pistons, rings, clips, and pins

Specifications

• Bore size: 3.882″

• Oversize: +0.015″

• Compression ratio: 10:1

• Dome type: Domed

• Quantity: Kit includes 2 pistons

• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Wossner K8857D040-2

• 56-W9967.040.WO

Vehicle Fitments

• Harley-Davidson Twin Cam 88″ Big Bore (103 cu. in.) 1999–2012