Description
Stock pistons wear down over time, reducing compression and power output—especially under sustained high-RPM operation or forced induction. The WSM Piston Kit delivers OEM-quality construction with engineered upgrades that reduce friction, dissipate heat more effectively, and strengthen critical ring groove areas, giving you reliable performance gains without compromise. Whether you’re rebuilding after a failure or upgrading for durability, this is the precision component serious Honda 420 builders choose.
- Fits: Honda 420
- Oversized: +0.25 mm
- Includes: Piston, rings, pin, clips
- Material: OEM-equivalent quality
- Piston skirts: MOS2 coated
- MOS2 benefit: Reduces friction, draws heat
- Ring grooves: Specially hardened
- Clip design: Improved E-clip
- Installation: One kit per cylinder
- Additional rings: Available separately
- MPN: 50-231-04K
