Oh, in that case take it wheelin, and let a big rock do the work for ya... Same thing, it's just trying to make it sound like a Hoover, that's it's only meaning in life. Gut it, or dump it. If it's good, leave it.
exhaust resonators are like miny mufflers, they resonate or reflect the exhaust and pretty much help out the actual big muffler. We have had them replaced quite a few times becuase when they get old and reflect the exhaust they rattle like a catalytic can, their usally not too expensive in my expirience though.
so i did it and i found a noticable change in horse power. in the high end i get up and go like its cool. low end i feel like i lost a little bit of umph. but i like it. it goes well with my 3.4 with the trd supercharger.