The Rock Krawler Adventure-X rear long arm upgrade for 2018 and newer Jeep Wrangler JL two-door and JLU four-door models replaces stock rear link geometry with extended arms to improve axle articulation and suspension geometry for lifted builds. It’s offered as an upgrade to enhance off-road stability and to integrate with other Adventure-X suspension components for more capable rear suspension behavior.
Rock Krawler 2018+ Jeep Wrangler JL 2-Door / JLU 4-Door Adventure-X Rear Long Arm Upgrade