Pro Comp Suspension?s new U-joint style drive shaft?s are the perfect upgrade for 2007 - 2008 Jeep JK 4WD vehicles with 2? or more of lift. When lifted, the driveline angles are increased, which increases the potential for driveline vibration. Pro Comp U-joint style drive shaft?s will allow for vehicle operation in 4WD at speeds above 25 mph. The factory drive shaft ball and cage design joint is replaced with #1310 style u-joints to allow for a stronger engagement, increase the range of motion, and improve seal and driveline life. Exclusive yokes, not flange adapters, are used to allow for a longer drive shaft, unlike our competitors versions. Pro Comp Suspension front drive shaft?s are constructed from 2.00? x 0.120? DOM (drawn-over-mandrel) steel tube. Kits come complete with necessary mounting hardware.