The BorgWarner EFR high-boost actuator identified by .83 is designed for use with 64mm–80mm turbine-wheel configurations. It supplies the high-boost control calibration expected in larger-wheel EFR turbo setups and is used when replacing actuator hardware on compatible EFR units. Fit this actuator to achieve the intended high-boost response for 64–80mm turbine-wheel EFR applications.
BorgWarner Actuator EFR High Boost Use with 64mm-80mm TW .83