13322-Pna-003 Main (Upper) Brg B - Overview. The 13322-PNA-003 Main (Upper) Brg B is an essential bearing component within the Honda engine systems. It primarily supports the crankshaft in its upper position, ensuring smooth rotation and stable mechanical motion. This bearing is critical for optimizing engine reliability and prolonging engine life, providing seamless integration with existing components, while maintaining optimal performance and durability.. Key Features. OEM main (upper) bearin