Yeah, I thought the prices were pretty fair from what I have previously seen.

It looks like the FJO just connects to the ECU and can read from the sensor that would take the place of the narrowband. Is that how they all work? I was worried that I would have to get another bung welded for a wideband to avoid a CEL that would throw off tuning. The FJO is much more expensive because unlike the AEM kit, it doesn't include the sensor and the sensor costs an additional $250.

I am just unclear as to how a wideband works in relation to the narrowband that the ECU relies on.