ordered a 2T fender and air box cover, and fitted it to my 2013 4T..had to drill a hole at the very front tip, but it installed nicely, easy to access my air filter now, without removing the fender,

with the lip under the airbox now trimmed, and plastic screws on each side, so with the rare dismount, the fender wont break off at the end..

nice upgrade, should work for any 2009 to 2013 Evo 4T..

Ah, I suppose this ( '13 2t rear fender with airbox cover) would be possible on a '12 too?

YUP.