I just picked up a 2011 Maxima SV. I love the car and already plan on some cosmetic upgrades like tint, rims etc. But I'm looking for what performance upgrades should come first. Thanks for any input

 

Eibach pro kit, rear sway bar....that would be a good starting point.

 

I have done Racingline Y Pipe and rear sway bar with RL endlinks and recommend both. Next I would like to do a catback exhaust. I briefly had an Injen SRI on my previous Altima. It produced noise but little else and I felt it wasn't worth the cost. If you are going to do wheels, then you will want to do the Eibach springs like 1996blackmax suggested.