PISTON KIT HARLEY 4.247″ SET/2, WOSSNER K8852DA-2 DAVIDSON, ROAD

This Wossner piston kit is built for Harley-Davidson Twin Cam engines modified to Big Bore configurations of 103 or 113 cu. in., covering model years 1999 to 2012. Featuring a standard bore size of 4.247″ and a domed 10:1 compression ratio, the kit is engineered for high performance and durability under demanding conditions. Manufactured in Germany, each kit includes two forged pistons along with rings, clips, and pins.

Features

• Forged high-performance pistons with skirt coating

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

• Elliptical design ensures uniform bearing surface under thermal expansion

• Distributes thrust loads evenly and reduces localised pressure

• Prevents piston collapse under high-temperature 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 K8852DA-2

• 56-W9973.000.WO

Vehicle Fitments

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

• Harley-Davidson Twin Cam Big Bore (113 cu. in.) 1999–2012