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| BN-817F1 | BN-817F2 |
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| BN-817F1 & BN-817F2 | BN-817F2 bolted to BN-521F6 |
| Part Number | Inlet/Outlet | Sensor | Additional Info |
| BN-817F1 | 5 bolt inlet, 2 bolt outlet | 1 sensor | OEM# 28180, w/2 hanger bolts |
| BN-817F2 | 5 bolt inlet, 2 bolt outlet | 1 sensor | OEM# 28300, w/2 hanger bolts on outlet |