[jesseclee]

I've also heard that the individual socks kill velocity.

So why not use K&N filters? Looking at the Fuji's air horn bolt pattern, it looks similar to the sidedraft Weber DCOE's. K&N makes filters of various sizes for this bolt pattern:

Another option is the Piper Cross large filter

These are made in DCOE bolt paterns as well as in blank plate form, so you can create your own openings and bolt patterns.