This Rock Krawler box kit entry for 2007–2018 Jeep Wrangler JK described as a 4.5 AX/X2 CS/TG with a 6-inch rear stretch identifies the rear upper components tied to that kit configuration. It indicates the rear upper parts supplied for JK models requiring the 4.5-inch AX/X2 geometry combined with the six-inch rear stretch across the stated model years.
Rock Krawler 07-18 Jeep Wrangler JK Box Kit JK 4.5 AX/X2 CS/TG w/ 6in Rear Stretch - Rear Upper