the 2001 maxima has good power. what ever you do, do not and i mean DO NOT get the electronic supercharger. its garbage and a big waste of money. bolt-ons like cold-air intake,exhaust, maybe an apexi s-afc or fuel pressure regulator will do. or get a nitrious wet kit. there is also a supercharger available for the 2001 as well. just do things right and then youll be running really good.