BN-527A/BN-527B/BN-527C1/BN-527C2/BN-527D1/BN-527D2/BN-527E
| Part Number | Length | Inlet | Outlet | Additional Info |
| BN-527A | 17 1/2" | 3 1/2" | 4 1/4" | must have bolt pattern |
| BN-527B | 17 1/2" | 4 1/2" | 4 1/2" | must have bolt pattern |
| BN-527C1 | 19" | straight 4 3/8" ring gasket | straight 4 3/8" ring | |
| BN-527C2 | 19" | 3 5/8" straight flat | 4 3/8" straight flat | w/out sensor |
| BN-527D1 | 19" | straight 4 3/8" ring | straight 4 3/8" ring | w/sensor |
| BN-527D2 | 19" | 3 5/8" straight flat | 4 3/8" straight flat | w/sensor |
| BN-527E | 15 3/4" | 1&7 o'clock | 10&4 o'clock | w/out sensor, 4 1/2" center bolt |
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measurements required overall length; inlet & outlet size; clock position of flanges; with or w/out sensor |