SuperPro's fitter friendly complete front lower control arms offer not only a significant performance and durability upgrade - they also offer an easy DIY or professional install. No pressing in new bushings - these arms arrive fully assembled with pre-installed SuperPro bushings and new ball joints. We've worked hard to make these a huge bang-for-the-buck upgrade with fully upgraded and outfitted arms offering a front end refresh for your ride! SuperPro Tip - SuperPro strongly advises that both arms should always be replaced at the same time to maintain the correct geometry and operation of the vehicle.