is there anything to do on the maxima to get more power..without voiding the warranty..supercharger any updates??

there are a few mods available to add some power here and there. any area related to a mod that goes bad can be denied warranty covered work at the discretion of the dealer.

I really wish you would read through other posts; you will learn so much. or even just search the Internet a little.

maybe this title will help you better/avoid some flaming.

Could you explain you thread title, Maxima is slow?
Yes to your question: Catback, K&N filter to name a few.

flywheel, clutch, forged light weight wheels....

Do you offer any wheels for us?