This is a little guide to installing a manual boost controller on an Evo VIII. I installed a Dejon Tool MBC on my 04 RS, but the same basics apply to all Evo's and MBC's. I installed mine in a difficult to reach spot, deep and well concealed behind the intake scoop (it's not like it needs constant adjusting). You can mount it anywhere you really want, but keep in mind that the closer to the wastegate the unit is, the better it will perform. Please, don't do this unless you have a boost gauge.
You will need the following tools;
10 mm socket and various extensions
needle nose pliers
4 boost/vacuum caps (4mm)
Release the four metal clips that hold the top of the air box and remove the two plastic screws and clips on the scoop. Remove the intake scoop, top of the box, and the filter inside.