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Performance Cylinder Assembly Most Commonly Used for (but not limited to) GY6 150cc engines, 61mm piston. Most GY6 engines need to be bored out for the sleeve of this larger performance part to fit. ***Current photos show angled fins but current inventory has straight fins.***

  • Assembly Includes:
  • 30A8655 Piston and Ring Set
  • Head Gasket Set
  • Cylinder Block

Cylinder Block Assembly - Big Bore, GY6, Performance, 61mm

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