I ditched the oem AC box for aftermarket.. for a few reasons. The factory box is just an space hog and it looked like there was just going to be too many clearance issues.I could barely get it back in, just after increasing my tunnel size just a little was one. Also, if I had gone much bigger, the floor duct would have been a big deal. Another reason is, I just didn't see enough room for the dbw pedal. I was ready to upgrade anyway. I just felt like I was constant battle to get cold air. It would be fine.. then it wouldn't. But space was was the biggest factor, since all of my electronics are housed in the dash. I played around with the USCT pedal bracket over the weekend. I'll post in my thread here in a bit. You'll see that the pedal needs that room that the ac box wants as well..