Are aftermarket upper control arms required on the 2007 - 2014 FJ Cruiser systems?
No, aftermarket up control arms are not required on 07-14 Toyota FJ Cruiser. The FJ Cruiser UCA’s provide enough alignment adjustment to set the vehicle within the factory alignment spec range. Lifting the vehicle over 2.5” on some vehicles the stock upper control arms have difficulty getting caster correctly within the factory recommended range. Vehicle set with less than 2.5” of lift can be aligned using the factory upper control arm. For more information contact ICON tech-support (951) 689-ICON.