(pictured is BN-120A)
| Part Number | Front Body OEM# | Rear Body OEM# | Left Sensor | Right Sensor | Rear Sensor | Additional Info |
| BN-120A | 25314344, 25325539 | 25311944, 25326305 | 6 1/4" below left flange | 2" below right flange | 3" below rear body | 3 bolt outlet, one hanger between converters,6 3/4" straight rear pipe |
| BN-120B1 | 25325539 | 25325538 | 6" below left flange | 9" below right flange | 7 1/4" below rear body | 2 bolt outlet, 14" curved rear pipe, 1 hanger behind rear converter, rear flange bolt, sensor & hanger are inline, 3&9 o'clock |
| BN-120B2 | 25325539 | 25325537 | 10" below left flange | 9" below right flange | 7 1/4" below rear body | 2 bolt outlet, 14" curved rear pipe, 1 hanger behind rear converter, rear flange (11&5 o'clock) does not line up with sensor & hanger |
| BN-120B3 | 25325539 | 25325538 | 10" below left inlet | 9" below right flange | 7 1/4" below rear body | straight rear flange |
| BN-120B4 | 25325530 | 25325537 | 6" below inlet | 9" below right inlet | 7 3/4" below body | twisted rear flange |
| BN-120C | 25314344, 25325539 | 25316631, 25326304 | 8" below left flange | 8" below right flange | 1 1/2" below rear body | 2 bolt outlet, 4" rear pipe, 2 hangers in middle, 1 3/4" pipes on front |
| BN-120D | 25173633 | 25316633 | 6" below left flange | 9" below right flange | 3 3/4" below rear body | 2 bolt outlet, 6 1/2" straight rear pipe, 1 hanger behind rear converter |