This is a ad on EC you for a 96 through 98 1.8 L engine. I purchased this from Fab9 tuning and did not realize it was not a standalone engine management system. I was putting the Miata engine into a different vehicle and just wanted a ECU set up to run the engine only. This plugs into the factory ECU in your Miata And has very nice advantages for tuning. It is brand new and sealed ECU plug-in unit and wiring has never been open. You can get more information on it from motorsport – electronics.co.uk