i had 0 fitment issues really. a tad bit of trimming to the crash bar, more like a notch then anything else. just to bring the ic up about an inch, it sits flush with the bottom of the radiator/ac cores.
IIRC i have one of the thickest cores out of all in my car, 3.5 inches. i know you can get bigger but i dont think any ms6'er has something thicker. i think i did the least modifications with the biggest core, let me put it that way.
both pipes, and i ****** up on this, i put both pipes right beside the drivers side headlamp. i should have run the hot side down there, and the cold side on the inside of the frame, but hey... live and learn.
The core i bought was this one,
here, and the only think i would change if anything would be to angle the endtanks to about 50 degrees, that would have been the absolute best fitment possible for an off the shelf intercooler. plus it has the ability to fill up the whole grille!