I just brought a rad support off an E3 for this exact reason on friday...
So here's some pix of all the brackets that are on the front of an EVO that are not on a GSR...
Drivers side top bumper mount
Passenger side top bumper mount
This mount is the drivers side mount for the crossover intercooler pipe. Passengers side is a mirror image..
This is the top center mount for the intercooler and crossover pipe..
The other difference is this piece.... A GSR one is longer (red line).. EVO is shorter like how this one has been cut.
This support came of an EVO but it's had the support replaced at some stage so the above brackets have all been swapped over to this non EVO support. This support has also been bent then sort of straightened. LoL. The car I got it off looked like it had, had a pretty hard life... Poor thing....
You do not "need" to cut this shorter for any reason.. I have EVO everything on the front of my GSR and the longer GSR version does not interfer with anything...
Also EVO headlights are slightly different because of these brackets too...
Non EVO. You can mod these to make them fit...
Genuine EVO.
If you need any more help just let us know...