Product Info:
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