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The BorgWarner EFR low-boost actuator is specified for use with 55mm and 58mm turbine-wheel setups and carries the .64 notation. It provides the boost control action intended for low-boost EFR configurations and is used when replacing or adjusting actuator components on compatible EFR turbos. Install this actuator to match the intended boost control for 55–58mm turbine-wheel EFR arrangements.
BorgWarner Actuator EFR Low Boost Use with 55mm and 58mm TW .64
