But seriously, if you want a quick and cheap upgrade to a loud roar that'll wake the neighbors, chop off the muffler and clamp on a glasspack. You can find Thrush glasspacks or Cherry Bombs for about $25 and the clamps for $5...
these aren't my videos, but here's one with the cherry bomb and one with a straight pipe setup
[ame="http://www.youtube.com/watch?v=rnd0hrJwVRc"]2006 Tacoma 4.0 V6 Cherrybomb Extreme Muffler - YouTube[/ame]
[ame="http://www.youtube.com/watch?v=6iQiCvmOBXE"]straight pipe tacoma - YouTube[/ame]