Help The Beast

[vs_calaisII2]

i am looking to increase the power of my vs series 2 calais and i dont know what to do to it what would be the most effective way of increasing the power without spending too much roughly around $300-$400
chip
cold air intake
stage 2 shift kit
is there anything else i could do to my car and where do you gett a chip stage 2 shift kit and CAI from i want a beast please help.

 

[Bloodmoon]

mite as well get a cold air intake

 

[Infus10n]

get a CAI and a stage 2 shift kit.