These boxed upper control arms are the perfect upgrade for your 2011-2019 2500HD or 3500HD truck. The boxed design makes them extremely sturdy which makes them great for towing and offroad use. The sealed ball joint is stronger than factory and is designed to withstand harsh environments and road conditions. You can add this kit to your stock or lifted truck to assist in leveling, help with alignment issues, and to gain more droop travel.
Supersedes Model - UCAK100051