One of my first few steps into building my first vehicle, an 01 TJ, is to get the audio done and then a new muffler. Since it's only a 2.5L, I don't want to invest in a full catback and a muffler should help me out. Please give me some suggestions on what muffler I should get. Hopefully no more than $130. I'm on a budget, being a high school student.