Pac Div ramped up the hype for their new album, GMB, this past week when they dropped "Cross Trainers." The beat and their verses were reason enough alone to get excited, but it didn't hurt that they got Blu and Kendrick Lamar to hand over some guest rhymes. It makes for one of the strongest cuts we've heard from Pac Div to date, and a damn good reason to cop GMB later this month.