GY6 50cc Complete Exhaust For QMB139 China 4T Scooters exhaust system w/o secondary air system SAS for GY6 139QMB/QMA
OEM quality without the SLS. For models with a factory-fitted SLS system, this needs to be blanked off. The positive side effect of this: the scooter has better performance without the SLS.
OEM quality without the SLS. For models with a factory-fitted SLS system, this needs to be blanked off. The positive side effect of this: the scooter has better performance without the SLS.