Plug n' Play connectors to allow fitment of various injectors (e.g. Genesis 380cc , 550cc, or 630cc) to cars with Jetronic ("EV1") connectors on the wiring harness (i.e. almost all EFI Mk2 - Mk4 cars except R32 and 24v VR6). These click right on. No mods are involved. Installation takes mere seconds. Pricing is per connector with one needed per injector.