The Wossner K8594D225-2 piston kit is a high-performance forged piston set designed for Harley Davidson Twin Cam engines. Engineered for enhanced durability and thermal efficiency, these pistons offer a flat top design with an oversized bore of +2.25mm (3.837") and a compression ratio of 8.5:1. Made in Germany, this kit includes all necessary components for installation, ensuring precise fit and performance.

Features

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  Forged high-performance pistons with skirt coating

  
  


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  Elliptical design for even heat expansion and load distribution

  
  


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  Optimised combustion chamber heat transfer

  
  


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  Flat top design with 8.5:1 compression ratio

  
  


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  Includes rings, clips, and pins

  
  

Specifications

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  Bore size: 3.837" (+0.089", +2.25mm)

  
  


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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-W9865.225.WO

  
  


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  Ring Set Part No. 975XSY

  
  

Vehicle Fitments

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  Harley Davidson 1453cc Twin Cam 1999–2009

  
  


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  Harley Davidson 1514cc Twin Cam 1999–2009

  
  


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  Twin Cam 88 (88 cu. in.) 1999–2006