BBC Upper Thrust Main Bearing Billet Block

The BBC Upper Thrust Main Bearing Billet Block is a precision-engineered component designed for big-block Chevrolet enthusiasts. This product serves as the critical upper thrust bearing surface that controls crankshaft endplay and axial movement within the engine block. It is ideal for engine builders and performance mechanics working on BBC rebuilds or stroker builds.

This billet block bearing solution offers enhanced durability and dimensional stability, particularly when operating under high RPMs or with elevated boost pressures. The design eliminates weak points found in cast iron, ensuring superior rigidity and load-carrying capacity. Its precision-machined surfaces help maintain proper bearing clearances while minimizing friction losses.

Engine builders will find this bearing block assembly compatible with all big-block Chevrolet platforms, including the 396, 402, 427, and 454. It is particularly beneficial for applications producing 600+ horsepower or utilizing nitrous oxide systems. This product is essential for maintaining optimal crankshaft positioning and ensuring reliable performance throughout the power band.