We have recently designed a new intake, that has a bend in it. This seems to solve the idle issue that a few of you may have been having. It's crazy, but the problem always seems to be on a 9, not sure what year your evo is.

You have the breather valve hooked up?

 

i have an 8 ....
and no the breather line that comes from the valve cover is with a small filter .....
i dontt like the idea of having that connected to the intake , kinds of gets oil residue even if i have a oilcatch can .....

its incredible my car idles horrible and sounds like im on 2 cylinders