Okay, so I've been reading this forum for days I have come up with some very useful info! Still I am left with some question.

I recently bought an 04 Maxima SL, love the car by the way. Looking under the hood it looks like this car has the potential to be ridiculously quick. Maybe a few more hours a labor than my other car, but nonetheless potential.

First question, do any manufacturers produce front spoilers that attach to the stock front bumper?

2. After market headlights, I don't seem to be able to locate any.

3. Engine swap for a bigger engine? I currently have the 3.5L in it. It's hard to locate info through this forum. Sorry if they seem like NOOB questions.

4. How would you prioritize upgrades? Intake, exhaust, headers, Is gutting the cats worth it? Any other upgrades that will give me that little edge?

 

1. Stillen makes a lip for your bumper
2. There isn't any, most ppl open up there headlights and modify themselves
3. No engine swap
4. It depends how much you wanna modify your car.

 

Thank you for the info on the lip! Might pick that up.
What type of modifications have been done? Besides halos.
Bummer on the engine swap but a 3.5 is nothing to complain about
Hmm I'll probably end up doing all the mentioned upgrades. I might want to do a heavy upgrade, if you can name some possible upgrades (money not being an issue) please

 

You might also want to consider a bumper swap to 07-08.

 

Keep the stock 3.5, as it is already bullet-proof, and damn fast. Let it breath a bit better w/ K+N Intake, and get rid of the stock exhaust. I run a K+N filter in the stock box, and put on a Flowmaster cat back exhaust. The giddyup is much improved, and the sound is awesome! I also Dynomatted the whole interior, and trunk. A week after I bought the car ('04), I put a billet grille in, as the stock grill is UGLY! Brand new on Ebay for $60!

 

Congrats.

To start maybe do intake manifold spacers, vias delete (block plate), intake for our cars seem pretty decent so maybe just make it short ram by adding filter w/velocity stack. Or get cold air intake(Sounds sick but I gave mine up because some reason caused hesitation from cruising speeds to full throttle).
Then from there probably headers and get tuned down the road. That should make a stealthy quick Max.