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Tag Archives: 21XZ-B Speed

21XZ-B Speed Spec II Gold Edition Engine from O.S.

O.S. Engines - 21XZ-B Speed Spec II Gold Edition Engine

The 21XZ-B Speed Spec II is available in a special Gold Edition to commemorate O.S.’s 80th anniversary. A gold cylinder head and carb insert makes it extra-attractive for collectors, while the legendary O.S. performance makes it a must for high-octane …

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