there are actually 3 types of RB25DE, a non VVT version (R32), a VVT version (R33) and a VVT and extra cam lift version (NEO R34).....
.....I'm going through the process of building a Twincam RB30 with a RB25DE VVT head, you need to run a external oil feed to the head due to the fact that the RB30 block doesn't have a oil feed hole for the VVT system
