if your wideband has something to convert to narrowband signal for your ecu, then just use the stock one. the reason why people use 2 bungs 1 for narrowband 1 for wideband is that your ecu can only ready the narrowband signals, and you use the wideband for viewing your a/f ratio on soemthing like a lambda meter for tuning. i beleive there are kits out there to turn your wideband signal into narrow band for using with your ecu while still getting the functionality of your wideband for tuning.