Small is better than none, let's put it that way. I have a Summit unit and it fits great! It's safe insurance too because even a few degrees reduction will help when the oil gets to the turbo. And it's cheap! If I had to again, I'd use the 2-in-1 trans and oil coler though, makes everything a little cleaner in the front. But if it's the cooler on the pssgr. side of the rad, that's the trans cooler. Those are good too! I have one of each and the car runs great all the time.