2011-2021 Jeep Grand Cherokee Billet Adjustable Rear Arms Other solutions in the market offer standard threaded adjustments which lack durability, not to mention the threaded portions are not loaded axially. Our arms incorporate some of the same technology as the GRAND-AM racing team on their LC race cars, adjustment tabs. Each arm is precision machined from solid Blocks of 6061 billet aluminum and the tabs are laser-cut from steel and plated for an exact fit. By changing out the tabs with different offsets, you can tune the alignment of your vehicle to suit your needs whether you're trying to increase or reduce camber. The arms are designed to occupy the same space as the OEM arms. The stock bushing protrudes out of the part (shell) about a half inch on both sides. This combined with the fact that the bushings are soft results in a lot of deflection. We machine our parts so there is only 1/8 on each side and use an 85 Durometer poly bushing.This minimizes deflection and helps control oscillation. Extra Silicone Lube can be found HERE 100% Made in the U.S.A. Installation Click Here For Installation Notes Please make sure you use the supplied silicone lube before install to avoid the stiffer bushing from squeaking. Energy suspension bushings are known to squeak of not lubed. Finite Element Analysis Finite Element Analysis is based on the premise that an approximate solution to any complex engineering problem can be reached by subdividing the problem into smaller, more manageable (finite) elements. Using finite elements, complex partial differential equations that describe the behavior of structures can be reduced to a set of linear equations that can easily be solved using the standard techniques of matrix algebra. Why use Finite Element Analysis? The finite element method is being used in virtually every engineering discipline. The aerospace, automotive, biomedical, chemicals, electronics, energy, geotechnical, manufacturing, and plastics industries routinely apply finite element analysis. In addition, it is not only used for analyzing classical static structural problems, but also for such diverse areas as mass transport, heat transfer, dynamics, stability, and radiation problems. Finite element analysis is the method of choice for optimizing new designs, verifying the fitness of existing facilities, predictive performance and evaluating new concepts. In addition, it has been used extensively for accident reconstruction and forensic investigations. Why Stress Engineering? Like any other numerical approximation method, solutions produced by finite element analysis contain some error. The magnitude of the error is highly dependent on the type, size, and fineness of the model used. That is why not all finite element models are created equal. Indeed, the educational and industrial experience of the analyst, as well as the use of advanced technologies, are the most critical factors in obtaining accurate results. Stress Engineering is a leading provider of finite element analysis services to industries worldwide. Our reputation is founded on broad industry experience of our engineers and their ability to expertly apply this sophisticated analysis tool to achieve reliable solutions. Shipping Policies Please click Here for our shipping policies. Hawaii and Alaska: Please email us Here for a shipping quote. We cannot honor your checkout shipping costs. International locations: We are always willing to ship inside the USA to your forwarder.