If you're looking for heavy-duty upper control arms for your LML Duramax, look no further than the ReadyLift 44-3100. These arms are made in the USA from laser-cut, CNC-bent chromoly plate steel and feature robot-welded construction for maximum strength. The ball joints are spring-loaded and designed for extreme duty, while the billet aluminum dust caps keep out road debris and prolong ball joint life. The arms are ideal for use on stock, leveled, or mild lifted trucks (up to 4"). They come with ReadyLIFT's proprietary TCT self-lubricating, free-floating pivot bushings and feature a rugged Anthracite Gray powdercoat finish