Well with the opening of Owings Mills and it being 20 miles closer than Devon, PA for me, I decided to do the 4G/LTE upgrade. The folks at this service center were terrific. Extremely cooperative and obviously concerned about professional presentation and treatment of their customers. The installation took about four hours, a bit longer than they had estimated but I can already see a fairly significant improvement in the map refresh speed and Slacker loads. Measurement on faster.com showed a five times increase in speed. When I got home however, I found this part in my trunk which was not there before. Does anybody recognize this and where it goes?