M-Works M21H - Marine .21/3.5cc Cooling Head
Specs:
- 1.5mm lower than the O.S. original marine head
- Aproximately 40% larger water cooling volume compared to the original O.S. marine head
- M5 Stanless Steel Nipples
- Diameter: 39.7mm
- Height: 12mm
- Weight: 20.4g (including nipples)
Fits:
- M-Works O.S.Speed 3.5cc Marine Engines
- O.S. R21 Engines
