I've got one on my 01 eth. sounds much better to me. Not as harsh as a straight pipe but much throatier than stock. Bighammer is right, you can piece something together easily. the MEK just makes it really easy. about the only gain you should expect is a little less egt's. Mine dropped only a little. I didn't notice any power imrovements (didn't expect any) and I don't think it spools any quicker (some say it will spool faster). Good luck.
-Jason