PISTON KIT HARLEY 3.915″ SET/2, WOSSNER K8594D425-2 DAVIDSON

The Wossner K8594D425-2 piston kit is a forged performance component tailored for Harley Davidson Twin Cam engines. Designed with a +4.25mm oversize bore (3.915″) and a flat top configuration, these pistons deliver enhanced structural integrity and efficient heat management. Manufactured in Germany, the kit includes all essential components required for reliable engine assembly and operation.

Features

• Forged high-performance pistons with skirt coating

• Elliptical design ensures uniform load distribution under heat expansion

• Optimised for effective heat transfer from combustion chamber to cylinder walls

• Flat top pistons with 8.5:1 compression ratio

• Includes rings, clips, and pins

Specifications

• Bore size: 3.915″ (+0.167″, +4.25mm)

• Compression ratio: 8.5:1

• Quantity: 2 pistons per kit

• Made in Germany

Cross-Reference OEM Part Numbers

• Part No. 56-W9865.425.WO

• Ring Set Part No. 995XSY

Vehicle Fitments

• Harley Davidson 1453cc Twin Cam 1999–2009

• Harley Davidson 1577cc Twin Cam 1999–2009

• Twin Cam 88 (88 cu. in.) 1999–2006