I agree with Warr here. Short shifter kits just mess up shifting feel and precision, and worse, I'm told now that because of this, it prematurely wears out the synchros of not properly installed. There is not much benefit running a short shifter, and many Evo owners I know who had installed them previously had them uninstalled and have never looked back.
If you must get the feel of a shorter shift, consider a countersunk gearknob such as the ARC Titanium one. It marginally changes the length of the throw and the additional weight helps the shifter engage more precisely.