Ecumaster Plug In ECUs feature EMU Black technology in an OEM fitment enclosure for easy installation. Unlike Ecumaster Interconnectors, Plug In ECUs do not require a separate adapter. A single enclosure reduces complexity and installation time, and allows a stock base map to be pre-loaded to the unit. Plug In ECUs are housed in bespoke CNC aluminum enclosures that match OEM environmental ratings. Additional functions, such as extra inputs/outputs and lambda control, may be connected using an auxiliary harness.

Ecu is supplied with additional mating connectors for direct connections lambda additional outputs and others.