Why? It looks closer to a K20A2 manifold than an RBC. It goes into the same pattern that the JDM CTR gets the newer-RBC styled manifold since the Euro CTR has not gotten the same goodies. Of course I'm speaking of the JDM CTR K20A versus the EDM CTR K20A2 in the EP3R. I just see this as an extension of that - give them an "R" . . . but only in name.