JK Long Arm LCA Frame Bracket Pair Artec IndustriesJK Long Arm Rear LCA Frame Brackets (pair). Want to add Rear Long Arms to your JK? Our new bracket is designed to jig into the contours of the factory JK frame so you can use the same brackets we use on the Artecon. This bracket is not only strong with its boxed 1 4 inch thick structure, but it is designed to protect your joint from impact with its integrated skid plate. Includes both driver and passenger side brackets. Factory LCA brackets need to be