Upgrade your Cummins engine with these precision-engineered connecting rod bearings, designed to provide reliable and durable performance. The set includes 12 pieces of bearing, part numbers 3901174 and 4892798, with a +1.0 taper and a .040 overlay to ensure a snug fit and enhanced longevity. Manufactured in China to exacting standards, these bearings are compatible with various Cummins models, including ISB6.7, B4.5, ISB B4.5s, and QSB6.7. Keep your engine running smoothly with these high-quality, specialty bearings that are specifically tailored for your diesel powerplant.