BN-338A1/BN-338B1
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| BN-338A | BN-338B |
| Part Number | OEM# | Sensor | Inlet/Outlet | Additional Info |
| BN-338A1 | M4 247 17, 45 293, 5G13 5E213 BG | 1 sensor 1 1/4" below body | 2 bolt inlet, 2 bolt out | Ford, 10" pipe, rear flange bottom right notch |
| BN-338B1 | 5G13 5E211 BE, M4 359 01 07 683 | 1 sensor 1 3/4" below body | 2 bolt inlet, 2 bolt out | Ford, rear flange bottom right notch |