It is so easy and simple that most of our clients do it. The fitting instructions supplied with each box-unit are illustrated and of child-like simplicity. No knowledge of car mechanics or electronics is required. Most P-Tronic box-units are simply plugged in parallel onto the injection circuit using rapid connection plugs. This choice of connectors is the most reliable, the most long lasting, the most secure. And it is also the simplest. A simple click and it's done! To know more about the installation of P-Tronic additional box-units, go to our 'Fitting' section.