yeah, they have an extra hole towards the turbo for the sti tmic, i chopped mine off when i put my 02 wrx tmic on, heres some pics of mine

(02 wrx tmic onto 99gt/99gc8)

the tab i had to make up to bring the tmic towards the firewall:



the stock gt/gc8 bracket modified to rotate the end towards the passenger side strut tower:



you can see here where i slotted the bolt out hole and tightened it up with oversize washer when it was on the right angle:


i also made up some small tab brackets to bring the coilpack forwards so i could fit the gfb hybrid in there:


hope this helps you mate, you will have to do similar mods to fit your sti tmic, you'll also need a longer silicone elbow to go to the turbo if you're using the sti alloy y pipe