if your on a budget:
Texas Speed header back exhaust - $1650 vs. ARH or Kooks header back exhaust - $2500
SLP intake pipe and drop in air filter - $180 vs. ADM street intake - $500
custom tunes are different, if you can find a local tune for less than $425, do that, otherwise a diablosport predator programmer - $325 and custom tune $100.
simple bolt ons like these for less than $2500 are all you need when on a budget.
also, a short throw shifter: MGW shifter - $300 and gives you much quicker shifts