Man, you're lucky to have a G in high school. Lol I had a 2002 sentra on it's last leg in high school. If I were you, I'd just save money until you can get big boy parts or just save money for other things. You're in high school and you don't need to make a rice rocket with budget mods. You can't build max horse power without forking up the money. If I were you, I'd just lower the car and either find a cheap set of wheels or just repaint your wheels and call it a day. All you really want is sound and power, that's not gonna come cheap.

 

I like your mod ideas, that's about how far I'm going to take it too. It's much more expensive to get hp after the ones you've listed. I just need a tune now. But maybe once I get there I'll want more lol. Might do upper lower manifold port?