Im running a stock 2000 maxima right now and I'm looking for some extra power and some better gas mileage, a friend of mine suggested cold air intake. I've looked on the internet and searched here but cant really get a good choice on what I should buy.

What are you running and how is it?

 

There are literally 100's if not 1000's of intake threads on this forum. The information is out there, search for it.