The Wossner K8594D275-2 piston kit is a forged high-performance component designed for Harley Davidson Twin Cam engines. Featuring a flat top configuration with an oversized bore of +2.75mm (3.856"), this kit offers optimised thermal transfer and structural integrity under heat stress. Precision-engineered in Germany, it includes all essential parts for installation, ensuring reliable performance and durability.

Features

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  Forged high-performance pistons with skirt coating

  
  


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  Elliptical design for even load distribution and thermal expansion

  
  


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  Enhanced combustion chamber heat transfer

  
  


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  Flat top pistons with 8.5:1 compression ratio

  
  


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  Includes rings, clips, and pins

  
  

Specifications

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  Bore size: 3.856" (+0.108", +2.75mm)

  
  


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  Compression ratio: 8.5:1

  
  


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  Quantity: 2 pistons per kit

  
  


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  Made in Germany

  
  

Cross-Reference OEM Part Numbers

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  Part No. 56-W9865.275.WO

  
  


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  Ring Set Part No. 980XSY

  
  

Vehicle Fitments

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  Harley Davidson 1453cc Twin Cam 1999–2009

  
  


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  Harley Davidson 1530cc Twin Cam 1999–2009

  
  


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  Twin Cam 88 (88 cu. in.) 1999–2006