AND
MODEL
INDEX
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| BN-521F1 | BN-521F2 |
| Part Number | OEM # | Length | Inlet/Outlet | Sensor | Additional Info |
| BN-521F1 | GL9 | 51 1/2" overall, 1 1/4" outlet | 2 bolt flat flange w/lip in, 2 bolt flat flange w/ 2 1/4" lip out | 1 sensor 3/4" behind front flange | 10" round body, 40 1/2" neck, w/flex in front neck, w/hanger on neck |
| BN-521F2 | GL9 | 49 3/4" overall, 3" outlet | 2 bolt flat flange w/lip in, 2 bolt flat flange w/2" lip out | 1 sensor 3/4" behind front flange | 10" round body, 37" neck w/flex, w/hanger on neck |