what is the best intake to have on my 2000 maxima. also best exhaust would help. Thanks all in advance

 

Read some of the numerous threads about "best intakes" and "best exhausts" before you post. How do we know what you mean by "best" if you don't specify. Most products that are mentioned on this site are good in one way or another. Do some reading in the FAQ section and the Stickies.

 

Place Racing CAI and Cattman Y-pipe for exhaust

 

If you are talking about performance, I would have to say a true Cold Air Intake

 

place racing CAI

 

There was a very thorough research done sometime ago, and it seems that Warm Air Intakes give you more power. But with true Cold Air Intakes, you would have to make a hole somewhere as I correctly remember.
As for exhaust, go with a Y-pipe, combined with an intake, it will give you at least 15whp.