The GReddy e-manage blue, a piggy back ECU allowing in its basic form, adjustment of the fuelling via the airflow meter, using 5 potientiometers to adjust mixture within 5 separate revolution (rpm) ranges. Expandable via two additional harnesses (one for the ignition and one for the injectors) and set up using the optional Support tool, e-manage quickly becomes a far more versatile device allowing adjustment of the vehicle fuel and ignition map, on 8 different rpm load sites, as a percentage to the factory settings. Supplementary menus within emanage allow substitution of different airflow meters, as well as allowing selection of different injectors, and via another optional boost pressure sensor and wiring harness, control of the fuelling if the air flow meters' ability is beneath the output of the engine. Connection to the ecu is made either via the two universal harnesses already described or via a range of car specific plug and play harnesses available for a wide range of Japanese models