O.S. Cylinder & Piston Speed 21XZ-B Spec IIITower Stock# OSMG4835 • Manufacturer Stock# 2AN03000
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Notes from our tech department:
for the O.S. Engines Speed 21XZ-B Spec III Racing Engine, OSMG2060.
Newly developed cylinder liner with three scavenger ports and three
Cylinder Liner and Piston key #4-1