PISTON KIT HARLEY 3.934" SET/2, WOSSNER K8858DA-2 DAVIDSON, ROAD
This Wossner piston kit is designed for Harley-Davidson Twin Cam engines upgraded to Big Bore configurations of 103 or 106 cu. in., covering model years 1999 to 2012. With a standard bore size of 3.934" and a compression ratio of 10:1, the kit includes two forged, domed pistons along with all necessary installation components. Manufactured in Germany, the pistons feature a design optimised for high performance, durability, and efficient heat dissipation.
Features
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Forged high-performance pistons with skirt coating
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Designed for optimal heat transfer from combustion chamber to cylinder walls
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Elliptical design provides consistent bearing surface under heat expansion
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Eliminates localised pressure and evenly distributes thrust loads
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Prevents piston collapse in high-stress operating conditions
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Includes pistons, rings, clips, and pins
Specifications
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Bore size: 3.934"
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Size: Standard
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Compression ratio: 10:1
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Dome type: Domed
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Quantity: Kit includes 2 pistons
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Country of manufacture: Germany
Cross-Reference OEM Part Numbers
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Wossner K8858DA-2
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56-W9968.000.WO
Vehicle Fitments
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Harley-Davidson Twin Cam 88" Big Bore (103 cu. in.) 1999–2012
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Harley-Davidson Twin Cam Big Bore (106 cu. in.) 1999–2012