Hey guys, I'm new to the site and new to modifications, however, I am not new to civics, this is my 5th civic, but my first civic si. Recently bought a 2012 civic si coupe and love it. So I spent some time researching inexpensive ways to improve air flow, and stumbed along the idea of modifying the stock air box. I took it one step further...not only modifying the stock set up, but just removing it completely, with the exception of the stock air box and tube to the throttle body. After I removed just the stock piping (which was a real pain) I noticed the sound of the intake change dramatically and in a good way, and then I added a custom velocity stack (10cm/4in) diameter, that fit very nicely right over the lip of the air box, here's some pictures!