Our new performance lower arms replace the stock length lowers and gives you the ability to either run a secondary bypass shock for increased control or an air bump stop for bottoming resistance. We’ve developed and tested a FOX 2.5 bypass shock specifically for these arms with a custom bypass tube configuration. When designing these arms, we set them up for maximum useable wheel travel along with the correct shock motion ratio geometry. They are to be used with 2.5/3.0 coilovers that use a uniball/spherical bearing in the lower rod. They do NOT work with OEM style struts that use a bushing and sleeve in the lower mount.