Upgrading your Traxxas 1/7 Unlimited Desert Racer (UDR, model #85076-4)? These GPM front lower suspension arms are a popular choice. They're machined from strong 6061-T6 aluminum and anodized in a vibrant green. They replace the stock plastic arms with something much more durable for bashing or hard driving. The design includes Delrin collars to reduce play and stainless steel balls and screws for strength and to prevent rust. They come with the necessary stainless steel hardware for installation (3x20mm and 3x16mm screws). This is a direct replacement for the original part #8532. If you're looking to stiffen up the front end and reduce breakages on jumps and landings, these aluminum arms are a go-to upgrade in the RC community. Just make sure you have the right model!