4.0 Inch Lift 2.625 Inch Remote Reservoir Package 2017-Up F-250/F-350/F-450 Diesel Only Rock KrawlerThe Rock Krawler RRD 2. 625 inch Remote Reservoir Shocks fluted aluminum body gives the advantage of weight reduction without sacrificing strength. Which not only make this shock the lightest remote reservoir shock in its class, it also provides a surface area greater than most 3 inch bodied shocks. The fluting provides the structure required to ensure the aluminum cylinders are as strong, if not stronger than their steel 2. 5 inch counterparts. The