SS Supercharged Optional for the LSJ was a performance package coded G85 that added Recaro bucket seats and a limited slip differential (LSD). So I'm newer to cobalt stuff. Al breaks down the first 5 modifications you should do to your supercharged LSJ. 2006 cobalt ss g85 package! mods zzp-intake-longtube header-exhaust! ls4 throttle body. General Cobalt - Differences Between LNF and LSJ - I searched and couldn't find anything exactly on this topic. Engine Modification recommendations for 2.