BN-552F1/BN-552F2/BN-552F3/BN-552F4
| PART NUMBER | INLET/OUTLET | BODY | HANGER | SENSOR |
| BN-552F1 | 4 bolt inlet, 3 bolt out | oval body | 1 sensor 1" below 3 bolt flange | |
| BN-552F2 | 4 bolt inlet, 3 bolt out | oval body | 1 hanger bolt on outlet flange | 1 sensor 1" below 3 bolt flange |
| BN-552F3 | 4 bolt inlet, 3 bolt out | round body | 1 hanger bolt on outlet flange | 1 sensor 1" below 3 bolt flange |
| BN-552F4 | 4 bolt inlet, 3 bolt out | round body | 1 sensor 1" below 3 bolt flange |
| BN-552F1 flange | BN-552F2 flange | BN-552F3 flange |