I’ve noticed that other mafs do not have a screen on the front so I took the screen off of my 55mm maf. It pulls a little harder through the upper rpm and has increased the boost by about ½ psi or roughly whatever the width of the needle equates to. I have never heard of someone doing this before so did I over looked this thread and is this old news or is this common knowledge as something not to do. As far as performance I put it close to the same gain as removing the air silencer. Any comments or cautions on this would be appreciated.