Description
MA3B –
PAI Cummins 171990 or 4089405 is a standard-size connecting rod bearing set used on certain Cummins ISX and QSX 15L engines with the drilled/saw-cut connecting rod design. Cummins overhaul-kit documentation lists 4089405 as a STD rod bearing set and uses six sets per six-cylinder engine.
Common applications include:
- Cummins ISX
- Cummins QSX
- Certain ISX15 applications
- Engines using the drilled/saw-cut style connecting rod


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