Piston Kit Harley 3.915 SET/2, Wossner K8595D425-2 Davidson

The Wossner K8595D425-2 piston kit is a forged, high-performance assembly engineered for Harley Davidson Twin Cam engines. With a +4.25mm oversize bore (3.915") and a domed piston design, this kit provides a 10:1 compression ratio, offering enhanced combustion efficiency and power output. Manufactured in Germany, it includes all components required for installation.

Features

• Forged high-performance pistons with skirt coating

• Elliptical design ensures uniform bearing surface and thermal expansion

• Facilitates effective heat transfer from combustion chamber to cylinder walls

• Domed pistons with 10:1 compression ratio

• Includes rings, clips, and pins

Specifications

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

• Compression ratio: 10:1

• Quantity: 2 pistons per kit

• Made in Germany

Cross-Reference OEM Part Numbers

• Part No. 56-W9866.425.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