JKS Adjustable Control Arms (Front Upper) for Jeep Wrangler JK (2007-2018). Upgrade your JK Wrangler's off-road capability with JKS J-Flex adjustable front upper Control Arms. CNC-bent from DOM tubing for proper tire frame and axle mount clearance J-Flex control arms feature forged "flex" ends that are adjustable. The design increases reli...