The Rock Krawler box kit for 2007–2018 Jeep Wrangler JK listed as a 4.5 AX/X2 CS/TG rear upper kit refers to the rear upper components associated with that 4.5-inch AX/X2 configuration. These kit components are intended for JK rear-upper applications matching the CS/TG designation and the 2007–2018 model-year range described in the product listing.
Rock Krawler 07-18 Jeep Wrangler JK/JKU Box Kit JK 4.5 AX/X2 CS/TG - Rear Upper