A contact module is provided for an electrical connector. The contact module includes a body having a mating edge portion and a mounting edge portion. A lead frame is held by the body. The lead frame includes a differential pair of terminals extending between the mating edge portion and the mounting edge portion. The differential pair includes a positive terminal and a negative terminal having positive and negative mating contacts, respectively, and positive and negative mounting contacts, respectively. The positive and negative mating contacts extend from the mating edge portion in a first orientation. The positive and negative mounting contacts extend from the mounting edge portion in a second orientation. The first orientation at the mating edge portion is inverted relative to the second orientation at the mounting edge portion.