Mostly plug and play. Reuse VTEC solenoid, VTEC pressure switch, and knock sensor wiring. Secondary O2 may have to be extended if if doesn't reach. For B18C1 the IAB's will have to be wired on the P72 ECU (see figure 6 for OBD2A and figure 7 for OBD2B). The intake air temperature sensor will have to be relocated in the intake arm somewhere as the A2 manifold doesn't have a place for it (see figure 8). For B18C1 and C5 you can also convert over to the round style IAT and place the connector on the manifold (see figure 9 for plug style).