TeraFlex JL: Alpine IR Long Arms and Long Arm Brackets (NOT INCLUDED) provide complete alignment adjustability and dependability for maximum performance on JL Wrangler/Unlimited models with 3–6” lifts. Our innovative, maintenance-free IR Bushings provide unrestricted rotation and flex as well as excellent NVH damping to improve on- and off-road ride quality and performance. MUST be used with Long Arm Bracket Kit (JL 2dr: # 1958002) (JL 4dr: # 1958000) — NOT INCLUDED. Can be added to any existing suspension lift.