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If it doesn't say wideband in the ad then it isn't a wideband a/f ratio gauge. If it only says air/fuel ratio gauge, then it is the cheaper, less accurate gauge and nothing more than flashy colors going back and forth. The non-wideband a/f gauge that wires in the stock o2 isn't worth buying unless you just want the "look" without the "functionality". There is a difference.
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