Baggage- Basically the O2 sensor on the Rocket it narrowband between air/fuel ratio of 14.57 and 14.75 something. A wideband is full spectrum. By adding a wideband O2 you can get real time readings of actual air/fuel ratio while still sending a narrowband signal to the ECU. Just another gadget.
Thanks for the site and info guys.It impresses me how engine management has become so sophisticated and this exampe which I'd never even considered confirms it.And I'm sure not the only other device to come down the pike I'm clueless on.