I would def start with basics before adding or upgrading. Making sure you have a good reliable engine to start with is good grounds for good hp along with longevity.
Re torque head regardless of what he said. Check you plugs for proper gap and such, just check all the basics. You dont wanna put tons of money modding the engine just to find out it has a cracked head or something dumb.
Like said afm upgrade is lex afm HOUSING, electronics are the same, 550cc injectors, fuel pump. An afpr is also handy along with wideband.