Check out the ID of my Apexi N1. It picks up 1/8" after the flange which makes it a whopping 2.5". I believe that's stock size. This was the first mod I ever bought for my car back when I was "green" to Evos. Not sure if this is holding me back at my current power level, but i foresee a true 3" in the near future.





Also, check out the not quite 3" DC Sport 2-1. I'm not too sure if the DC Sport was revised or not and I have an old style. Anyone know? I don't remember if it expands after the flange or not. I could walk out to the car to double-check but I don't want to.