Evox has no version 2.7. Perhaps you mean Slayer's Auto-installer 2.7, which contains Evox 3935?
If so, it.. works, as such, with any version Xbox, as did 2.6 or 2.5 for that matter. It *does* contain newer bioses that older versions, but as you'll need to have already flashed a bios to run the disc, it's a moot point.
