Description
If you’re rebuilding or overboring your Evolution Big Twin, piston quality directly impacts cylinder sealing, combustion efficiency, and engine longevity. The Wiseco K1642 delivers the precision and durability you need for a reliable performance rebuild, with a complete kit that eliminates the hassle of sourcing individual components.
This high-silicon aluminum alloy construction resists thermal stress and deformation under sustained load, critical for maintaining compression and preventing blow-by in demanding conditions. Whether you’re refreshing a stock engine or upgrading displacement, you get a finished kit ready for installation without compromise.
- 3.518in bore diameter
- 8.5:1 compression ratio
- High-silicon aluminum alloy
- Forged piston construction
- Complete ring set included
- Wrist pins and circlips
- Top end gasket included
- 1994–1998 Harley-Davidson Road King FLHR
- Evolution Big Twin engines
- Cylinder sleeves sold separately
- Bolt-on installation ready
