1 The Heidts Pro-G independent rear suspension is an involved package consisting of a lot of parts. These are all driven components able to withstand 600 horsepower--CV joints and shafts, halfshafts, 9-inch aluminum housing and iron differential, and hubs. Steel parts can be painted or powdercoated. Keep in mind powdercoating involves heat--around 300 degrees F. Too hot for grease and seals. Powdercoat only bare steel and aluminum parts with bearings, seals, and hubs removed.