This GLYCO main bearing, part code 71-3869/4 0.50MM, is engineered to provide exceptional support and reduce friction within your engine's crankshaft. Crafted with precision, it ensures proper alignment and load distribution, contributing to smoother engine operation and extended component life. The 0.50MM undersize is crucial for applications requiring specific clearances during engine rebuilding or repair. Trust GLYCO for reliable engine components that meet stringent quality standards. This main bearing is a vital part for maintaining the integrity and efficiency of your vehicle's powertrain.