An electrical connector includes a connector housing and first and second differential contacts. A contact cavity is defined between opposed sides and opposed endwalls. First support members and second support members extend from the opposed sides into the contact cavity. Each of first support members is shorter than each of the second support members. The first and second differential contacts define a differential pair retained within the contact cavity. The first and second differential contacts are retained between two of the first support members. At least a portion of the first and second differential contacts extends past a level of the first support members. The portion(s) of the first and second differential contacts that extends past the level of first support members is exposed to air.