Does the Maxima have any quick and easy upgrades?

 

Do a search under the following headings, Greek:

Suspension
Intake
Exhaust
Upgrades

That should keep you busy for awhile.

 

1) aftermarket pads! - stock ones stink ($60-70/set)
2) brighter fog lights! - stock low beams suck, so the fog lights make up for it ($30-50/pair)
3) intake! - suck in more air ($120ish)
4) rear sway bar! - make that *** stick to the ground ($240ish)
5) front strut tower brace! - tighten up the front end and reduce cowl shake ($50-200ish)
6) from here on, there's tons of stuff to do.