BN-542A/BN-542B/BN-542C/BN-542D/BN-542E/BN-542F/BN-542G/BN-542H/BN542I/BN542J
| Part Number | Inlet/Outlet | Length | OEM# | Additional Info |
| BN-542A | 2 bolt in, 2 bolt out | 13 1/4" | -1990, 3 1/4" center bolt | |
| BN-542B | 2 bolt in, 2 bolt out | 13 1/4" | -1990, 3 5/8" center bolt | |
| BN-542C | 2 bolt in, 2 bolt out | 13 1/4" | K2AB | 1990+, straight bevel, straight flat |
| BN-542D | 2 bolt in, 2 bolt out | 13 1/4" | K2BW | 1990+, straight flat inlet, straight flat outlet |
| BN-542E | 2 bolt in, 2 bolt out | 13 1/4" | RDH21 | 10&4 o'clock - 4 3/8" center bolt, 10&4 o'clock - 3 1/4" center bolt |
| BN-542F | 2 bolt in, 2 bolt out | 15" | U2BSC0 | 10&4 o'clock inlet, 3&9 o'clock outlet |
| BN-542G | 2 bolt in, 2 bolt out | 12" | UJMC6 | 3&9 o'clock inlet, 1:30&7:30 o'clock outlet |
| BN-542H1 | 2 bolt in, 2 bolt out | 12" | 3C173 | |
| BN-542H2 | 2 bolt in, 2 bolt out | 10" | U014 | |
| BN-542I | 2 bolt in, 2 bolt out | 17 1/2' | 2G545 | 1 sensor in center of body |
| BN-542J | 2 bolt in, 2 bolt out | 16" | 25560 | |
| BN-542K | 2 bolt in, 2 bolt out | 15" | JSH62 |