On an NA
Throttle body, intake mani ported
Cam (But your a DOHC so you shoudl eba ble to use a mild turbo cam, but i dunno how well it owudl work, prolly hinder you)
Header, EGR blockoff plate
Exhaust
High flow cat
headwork,

And by the way, yoru GSX head is the same as yoru NA head minus the cam grind