exhaust, cai then drop pulleys but you have a gen 5 so a drop to 3.6 would probably yield lots of improvements. Dont go 3.4 until you really look into and find out the essentials to run a 3.4
For the gtp badges, those came on the 97-03 then it was gt or comp g, comp g being sced then i think 06+ gts were sced. not quite sure on the exact years for the gts tho. killer rims btw
oh and NEEDS MOAR LOW