"Under the Pentastar" is a weekly recap of some of the stories at Chrysler Group. This week's stories include the Fiat brand leading the way as the Chrysler Group earns another double-digit monthly sales increase; the new Dodge Dart is recognized as a top safety vehicle in its class; and with three races down and seven to go in NASCAR's Chase for the Sprint Cup championship, Penske Racing's Brad Keselowski is in first place in the standings.