The Jeep specialist at St. Charles based Axleboy Off-Road install a Clayton Offroad Premium 4.5" lift on a JK Unlmited from Illinois. The Clayton Lift kit fit well, and only required minor modification to work with the Dynatrac Pro-Rock 44. The intial flex via forklift shows great movement, stability and tire clearance. The owner also combined a PSC steering system as well. Here is a brief description from Clayton Offroad