ECU MASTER - HONDA K20A2 PNP FOR EMU BLACKECUMaster Plug and Play adapter for the Honda K20A2 with manual transmission allows for plug and play installation of the EMU Black standalone ECU. All ECUs are sold separately. Note: This adapter is designed for easy installation for K20 engine swaps. The A C circuit does not connect through the adapter. The vehicle's A C switch can easily be connected to an Analog Input pin on the EMU connector for idle control and an Aux Output may be used for A C