The ECU is easy...super easy...its in the passenger side kick panel. I bought my JRSC/BBK all together in one combo...but from the close proximity of the strut tower to the pulley, Im guessing that it would be easier to just unbot the 4 bolts that hold the Supercharger to the manifold. Im not sure what you are asking about the injectors...they are super easy to install too. there are just two bolts that hold the fuel rail in. I have the ZX3 kit...but it should all be basically the same. It should be pretty easy for you.