I'm new here, and I have an '02 4x2 (unfortunately). I want to replace the muffler (not a full cat back b/c im broke as hell...) I'm looking for a deeper rumble but nothing over the top, just more aggressive and a bit louder. One that adds some low end torque would be nice. Also any advice for approaching 150k miles? I also plan to convert it to 4x4 eventually.