What intake/exhaust for 00 G20?

Hi
I am new here to the infiniti g20
i own a sentra

My friend at school wants to get an intake and a cat-back exhaust for his G20 Automatic
when we looked, in order to fit a CAI he would need to get a new battery
are there any companies that make CAI without messin with the battery?
if not, where is the best place to get a POP charger Stillen or JWT

as far as exhaust, he would like the Greddy EVO
where is the best place to get those with the best deal?
thanks again
Greg

first off,
:finger: W E L C O M E :finger:

for the CAI, id recommend Hotshot CAI, it doesnt neccessarily need a smaller battery, if you can fit it behind there its fine. you could get a PlaceRacing CAI as well. try a body shop if you know any, or talk to Luke (G22DET). he owns Digitalracer.com and could get you them.

:D