Up for sale is a pretty much complete Hydra Nemesis 2.5 kit that came off of my 2000 Miata. The unit should work with other years but you would have to change out the harness. When I bought the car 2+ years ago one of the wires from the WB02 harness was pulled out so I just made an internal...

This is the original Hydra ECU. I ran it for a few years before getting the itch to tinker with something else. (I put the hydra in after running a Tec 3) I have all the documentation and pinout information you'd ever need to do a custom installation. It will work on any miata (maybe any car...