I purchased a "universal" Mishimoto OCC this past June and modified a system that appears to be working well. My FiST has a little over 2800 miles since new in April, and here's a picture of how much oil and gas has been caught in my OCC.
PS: I did this before a OCC system was offered for our car, and I am only posting to show how much oil and gas can get in to your intake w/out one.