Official: Hartge Engine Conversion for BMW 550i xDrive F10

The Germans at Hartge have released an engine conversion kit for the BMW 550i and its xDrive model.

The conversion increases the maximum power output by 15% from 407hp to 481hp. Furthermore they have upped the maximum torque from 600Nm to 690Nm. Finally acceleration from 0-200km/h is improved by almost four seconds.

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