PISTON KIT HARLEY 3.816″ SET/2, WOSSNER K8620DA-2 DAVIDSON, ROAD

This Wossner piston kit is specifically engineered for Harley Davidson 1200 Big Bore engines with a 3.812″ stroke, produced from 2004 to 2007. Featuring a standard 3.816″ bore and reverse dome design with a 10.5:1 compression ratio, this kit is intended for use with aftermarket Big Bore cylinders and requires case boring for installation.

Features

• Forged high-performance pistons (2 pcs), skirt-coated for friction reduction and durability

• Precision-engineered for effective heat transfer from combustion chamber to cylinder walls

• Elliptical design ensures uniform load distribution under thermal expansion

• Reverse dome pistons deliver a 10.5:1 compression ratio

• Manufactured in Germany

• Includes rings, clips, and pins

• Requires boring of engine cases and use of aftermarket Big Bore cylinders

Specifications

• Bore size: 3.816″ (standard size for Big Bore application)

• Compression ratio: 10.5:1

• Stroke: 3.812″

• Piston type: Forged, skirt-coated, reverse dome

• Quantity: 2 pistons per kit

• Wossner Part Number: K8620DA-2

• Alternate Part No: 56-W9956.000.WO

Vehicle Fitments

• Harley Davidson 1200 Big Bore (3 13/16″, 88 cu. in.), stroke 3.812, years 2004–2007