Piston Kit Harley 3.898 SET/2, Wossner K8594D375-2 Davidson

The Wossner K8594D375-2 piston kit is a forged piston set designed for Harley Davidson Twin Cam engines, offering enhanced durability and thermal efficiency. With an oversized bore of +3.75mm (3.898") and a flat top design, these pistons are built for high performance under demanding conditions. Manufactured in Germany, the kit includes all necessary components for precise and reliable installation.

Features

• Forged high-performance pistons with skirt coating

• Elliptical design for improved load distribution and thermal expansion control

• Superior heat transfer from the combustion chamber to cylinder walls

• Flat top pistons with 8.5:1 compression ratio

• Includes rings, clips, and pins

Specifications

• Bore size: 3.898" (+0.148", +3.75mm)

• Compression ratio: 8.5:1

• Quantity: 2 pistons per kit

• Made in Germany

Cross-Reference OEM Part Numbers

• Part No. 56-W9865.375.WO

• Ring Set Part No. 990XSY

Vehicle Fitments

• Harley Davidson 1453cc Twin Cam 1999–2009

• Harley Davidson 1561cc Twin Cam 1999–2009

• Twin Cam 88 (88 cu. in.) 1999–2006