Designed for those who already have a Rubicon Express XJ Cherokee Super-Flex or Super-Ride short arm suspension system. Our Extreme-Duty Long Arm suspension system will provide noticeable improvements in your XJ's on road handling. Off road, you will see unmatched performance on the most extreme trails. This package includes: a new crossmember and all 4 front Extreme-Duty control arms. Lift height will depend on the system you are upgrading.