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Load image into Gallery viewer, PAIR Style (Emissions) Cylinder Head for 50cc 4-stroke QMB139 Engines
Load image into Gallery viewer, PAIR Style (Emissions) Cylinder Head for 50cc 4-stroke QMB139 Engines
ON SALE
PAIR Style (Emissions) Cylinder Head for 50cc 4-stroke QMB139 Engines

PAIR Style (Emissions) Cylinder Head for 50cc 4-stroke QMB139 Engines

  • Your Cart Subtotal$44.99

PAIR Style (Emissions) Cylinder Head for 50cc 4-stroke QMB139 engines.

PAIR is an acronym for Pulsed Secondary Air Injection System. It is an emissions control system used to lower HC and CO emissions. It works by allowing air into the exhaust flow.

  • 39mm Bore
  • Intake Port Diameter: 17mm
  • Exhaust Port Diameter: 18mm
  • Emission Control System: Pulsed Secondary Air Injection System (PAIR)

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