To accommodate the increased travel and lift height afforded by the ICON Coilovers, this Stage 6 kit comes with Tubular Upper Control Arms which provide caster correction and feature our patented Delta Joint PRO, which allows for up to 90-degrees freedom of movement. ICON tubular rear lower links employ dual-durometer greaseless bushings at one end, and massive FK rod ends at the other to provide the best combination of free articulation and ride quality. The rear coilovers are mounted in a shaft up orientation and feature unique ICON engineered progressive dual rate coil springs that provide extra weight capacity for those who frequently load out their Broncos with extra gear and equipment while maintaining excellent on- and off-road performance characteristics. This suspension system is designed to provide up to 11.5" of front suspension travel and 14" of rear suspension travel when used with 35X12.50 tires. It may be safely used with 37" and larger tires if using the optional up-travel limiters (sold separately).