I run a 2.5 exhaust with a straight pipe and STI muffler. I make good power too and its pretty quiet unless you punch it or keep it below 4k rpm (at 4k it sounds fine to me, just a bit louder when comparing to running a cat) I'm 18, drive a purple nissan, with a racing seat + harness, and Bronze wheels. Cops never give me trouble. They don't even look at me. They look at my buddy with a bone stock 2.5rs more than they look at me. If im concerned about "noise", i just cruise by in 5th, or throw it in neutral. You can make noise on demand and keep it quiet just a easy.
Edit: for my power gains, I made 5hp and 4lbstq. I could feel the gains throughout the powerband, and street driving became a bit easier since I had more torque down low. If you go to my progress thread, you can see what things have been done to my car.
Last edited by Barney'sB14
on 2012-05-01
at 06-10-58.