This ICON Stage 2 suspension system for the 2003-2009 Toyota 4Runner/2007-2009 FJ Cruiser uses the same components as the Stage 1 system with a few simple changes and additions. The 2.5 Series coilover shocks used in this system are the Extended Travel version, offering increased wheel travel that will enhance your on and off-road performance even more so than the standard travel units. Since these shocks do provide more suspension travel, they require the use of an ICON upper control arm.; This system features upper control arms with ICON's patent pending Delta Joint. The Delta Joint is a heavy-duty high angle ball joint that combines the durability of a ball joint with the performance characteristics of a traditional uniball. While the industry standard uniball does a great job of allowing the control arms of a vehicle to articulate with little bind, they do have an inherent weakness that leaves more to be desired when used in a daily driven application - exposure to the elements. The Delta Joint features a zinc plated housing providing the first layer of corrosion resistance, while a tough grease seal keeps potentially harmful elements out of the inner workings of the joint. Metal on metal construction and a greaseable design increase the longevity of the Delta Joint while at the same time allowing for noise-free operation. What makes the Delta Joint unique is that it brings the best of both worlds to ICON upper control arms with features that make it more robust than a uniball, and at the same time capable of greater angularity than a typical ball joint.