Universal Parts Complete QMB139 Cylinder Head - Emissions

Primo Scooter Company

Regular price $44.99

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img-qind.JPGUniversal Parts Completely Assembled PAIR Style 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.