| BN-538LM | BN-538RM1 | BN-538RM2 |
| Left Side | Right Side | Right Side |
| Part Number | Inlet | Outlet | Sensors | Length | OEM Number | Additional Info |
| BN-538LM | 7 bolt | 3 bolt | sensor top of manifold | KLS2 | ||
| BN-538RM1 | 7 bolt | 3 bolt | sensor top of manifold, sensor rear of body on side | KLS2 | air before body on side | |
| BN-538RM2 | 7 bolt | 3 bolt | sensor top of manifold | KLS2 | air before body on side |