20578625 Crank Main Bearing, Precision Engine Bearing For Mack Truck

20578625 Crank Main Bearing, Precision Engine Bearing For Mack Truck This 20578625 crankshaft main bearing is a high-performance aftermarket replacement for Mack heavy-duty diesel engines, made of durable friction-reducing alloy with rigid steel backing to endure heavy loads, high temperatures and continuous engine operation; precision machined to OEM dimensions to maintain proper oil clearance, minimize crankshaft wear, suppress oil pressure loss and deliver consistent