| Part Number | Sensor | Engine | Additional Info |
| BN-271F | 4 sensors | 4.6L | both front converters on edge; left neck 1 1/2" long; right neck 3 1/2" long; right front sensor 1 3/4" below flange |
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Measurements Required engine size; number of sensors & location; pipe size between converter bodies; front converters flat or on edge |