For sale are genuine Cummins 3935644 roller bearings. It is used primarily on EPA98 Automotive 15 liter ISX/QSX engines. Cummins website:
https://shop.cummins.com/CSSNAStore/s/product/a2w4N000003sDiRQAU/cummins-roller-bearing-3935644
lets you enter your engine serial number to verify that this bearing fits your engine.
Fast. free shipping from the USA. Discount if you buy more than one.