This is Xray T4 7075 T6 Aluminum Adjustment Ball Bearing Hub 2 pcs Orange. These beautiful 7075 T6 aluminum adjustable ball-bearing hubs are direct replacement of the standard composite ones included in the kit. The aluminum hubs reduce the friction and make the car to run more free with increased the drivetrain efficiency. Suggested especially for stock class where super low friction drive train is important. The aluminum hubs are stronger and more reliable with increased life span. Color coated in XRAY distinctive orange color.