The UMA/ARacer wideband air/fuel ratio (AFR) module is a closed loop monitoring module for exhaust o2 levels. Accurately measure and tune easier with this module. Plug and play use with UMA racing M5/ ARacer RCMini 5 ECUs.
High accuracy and high response speed
"Close Loop Fuel Compensation" with RC/RCMINI Plus ECU, UMA Racing M4/M5 ECU