I guess it realy depends what you are looking for in your exhaust. I was running no cats and one dual in dual out Flowmaster 3 chamber muffler. I hated it, sounded like a civic with no power gains at all. I ripped that off after a month and went with two dynomax turbo mufflers with a custom h pipe, I love it. Sounds awesome and has a ton more power now. I also cut the pipe under the drivers door and ran it straight back with the h pipe by the trans.