It is pretty common knowledge that a air box on your car will restrict  your air flow.  Sometimes is isn't always that easy to the intake system you want due to your mass air flow sensor.  Well Fujita makes a Mass Air Flow Adapter that will allow you to install a filter directly to your air mass sensor improving air flow and reducing the restrictive air box.

With this Mass Air Flow Adapter you will have some performance gains that result in more hp. This is very easy to install and will have you on your way to improved performance in no time flat