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Hartge has apparent their new aerodynamic kit affairs based on the E89 adaptation of the Roadster. The Hartge BMW Z4 Aerodynamic Kits includes alone a advanced addle-brain and a awning lid lip which ability action added downforce on both axles of the car. The Hartge BMW Z4 Aerodynamic Kit genitalia are fabricated from PU-RIM and are not accordant with the model’s M Aerodynamic package. The Hartge BMW Z4 Silver Aerodynamic Kit additionally sits on new rims.