This GLYCO main bearing set, part number 71-4246/4, is precision-engineered to meet stringent quality standards. It is designed to provide reliable support for the crankshaft, minimizing friction and wear within the engine. The 0.30mm undersize specification indicates these bearings are intended for applications where the crankshaft journals have been machined to this specific dimension. Proper installation of these bearings is crucial for maintaining oil clearance and ensuring the longevity of your engine. GLYCO is a trusted name in engine components, known for its commitment to manufacturing excellence. Choosing this bearing set means opting for a component that contributes to the overall health and efficiency of your vehicle's powertrain.