| Part Number | Sensor | Engine | Additional Info |
| BN-271A | 1 sensor in front passenger neck | 2" pipes between converters | |
| BN-271B | 1 sensor in front passenger neck | 2 1/4" pipes between converters | |
| BN-271C | 4 sensors | 3.8L eng. | left front converter lays flat; right front converter on edge; right front sensor 4 3/4" below flange |
| BN-271D | 4 sensors | 4.6L eng. | both front converters on edge; right front sensor 2 1/4" below flange |
| BN-271E | 1 sensor in front right converter | 3.8L turbo eng. | 2 1/2" pipe between converters |
| 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 |