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The BorgWarner EFR high-boost actuator is specified for use with 55mm and 58mm turbine-wheel setups and carries the .64 notation. It provides the higher boost-control calibration required in high-boost EFR configurations and is suitable for actuator replacement or upgrade on compatible EFR turbos. Use this actuator to restore or alter boost response for 55–58mm turbine-wheel EFR assemblies.
BorgWarner Actuator EFR High Boost Use with 55mm and 58mm TW .64
