BMW 240i 340i 440i X5 Engine Crank Connecting Rod Bearing +0.25 B58 3.0 Turbo I6

These precision-engineered connecting rod bearings are designed for BMW B58 and S58 engines where the crankshaft rod journals have been professionally machined to a +0.25mm (+0.010in) undersize. Maintaining exact oil clearances at the connecting rod is vital for engine stability and longevity, especially in high-performance turbocharged applications. This set compensates for material removed during reconditioning, restoring factory-spec clearances to prevent premature wear or failure. Manufactured with high-fatigue resistant multi-layer materials, these bearings are built to handle the significant reciprocating loads and thermal stress of BMW’s modern straight-six power units.