advice need about future mods

advice needed about future mods

i have an 02 GT with Steeda pully's, K&N intake, o/r x-pipe, flowmasters,
tri-ax shifter, predator tuner, tinted windows, billit gas cap. i have $1,600 to spend, but i dont kno what to do with it. i was cinsidering lowering my car, but i dont want to have to go over speed bumps sideways. what would you do? i might be getting a cobra engine, but i will not be unsing the $1,600 to help purchase it. thank you for your time.

i was thinking about gears for a while, but i dont want to be doing 80mph and taching almost 3k. i raced an 02gt with alomst as many mods as me, but he had 3:73's and i smoked him 3 times. i had probably 3 car lengths on him by the end of 2nd gear! my car is silver, with is the factory rims (dark grey bullit's) i was also thinking cams, but i dont want my fuel milage to go to the dump, and i will also need to pass smog. i heard that if i get cams, i will never pass smog. why is it that no one mentioned headers? i also heard that the tb/plenum wasnt worth the money, unless i was going forced induction . thanks you all for your help

P.S. the gas cap i have is the silver rim, with a black door with GT inscrobed on it. i think it looks great, and i get compliments on it every time people see my car. plus it gave me 25 hp!