AFM & ECU different Injectors are same. the main Difference are the inlet manifold. the NICS has a 12 port inlet manifold the head is 6 port, there are two sets of runners on the NICS and only 6 on the ECCS, the theory on the NICS was that the two set of 6 runners are different length under low revs, or take off, the long ports are open giving more torque in theory. After the revs build up the second lot of runners are opened through the butterflys which are shorter for top end power. Turbo yes the RB25 bolts straight on, but you must get the banjos and oil lines as well. Next quetion the NICS chip is currently being worked on by a couple of people to see if it can be re-programmed so will have to wait and see.