CAI, tune, gears, and drag radials...
MANY other mods out there, but besides nitrous or FI, these 4 will be the only ones your ass dyno will really feel; and they will yield lower et's more than a couple tenths.
Once there, make sure you are set on your future
EXAMPLE:
If you KNOW you are going with sc or turbo, do NOT spend $$$ on exhaust unless you are positive it works to your favor i.e. Long tubes and a high flow system will usually yield 2lbs of boost lower. FI needs sum back pressure.... UNLESS you are going with huge boost. Now, thats a whole new story...