[djmtsu]

Funny you are posting this now, as I had the same question.

Since I am boosting the 12a, and I have to find a source/return for coolant I did some research on it.

The JDM 12aT had a very similar turbo as the S4/S5 FC's, a Hitcachi HT-18. They did not have coolant provisions, oil only.

So, after asking around to a few guys with 12a turbo set-ups, most do not run coolant on theirs.

I am taking a gamble, and am going to rum it oil only.

PS- Nate, I need that S4 manifold!!