I Dont know what year the cat was first placed in a CJ.. maybe it wasnt needed in the 80 year.. although Im pretty sure it was. Id buy it and take it for inspection. IF it passes great. If not they will tell you why and you can fix or add the needed items.
88 YJ 35's 8.8 rear, family style roll bar, ax-15 external slave conversion, Custom double D fab dash 4" of lift taurus fan, Head light wiring upgrade, MSD 6al, JB conversions SYE, 258 with RV cam, Long tube headers, Borla exhaust. 1"mm, Auto meter gauges.