I have a complete Hydra nemesis ECU with plug and play harness for a 99-00 miata I believe. It has the wideband O2 sensor option, and the entire ecu can be installed in 20 minutes.
It takes 1 minute to go back to stock ecu if needed, just plug it back in!
This package comes with the following;
-Hydra Nemesis 2.1.7 ECU from flyinmiata (O2 sensor option, closed loop Autotune)
-Wideband O2 sensor
-(99-00) plug and play adapter
-Serial cable to usb converter
It has my turbo setups tune on there, so you will need to get a basemap from flyinmiata and get it tuned, or just run autotune. It spits out surprisingly good tunes.
$550 Shipped anywhere in the US
Located in San diego, la jolla area
Shoot me a text at (760)310-2983 no calls please, as I will be in class