Main Bearing Set Coated SBC w/350 Mains

The Main Bearing Set Coated SBC w/350 Mains by KING BEARINGS is an essential internal engine component designed for Small Block Chevrolet (SBC) builds utilizing 350 cubic inch mains. This precision bearing set serves as the foundation for reliable crankshaft support and oil film integrity under extreme combustion pressures and high RPM conditions. Whether you're rebuilding a street performance engine, restoring a classic muscle car, or assembling a competition powerplant, this bearing set is engineered to maintain critical clearances and distribute loads evenly across your engine block's main journals.

KING BEARINGS engineered this main bearing set with a specialized coating technology that enhances load-carrying capacity and reduces friction between the bearing surface and the crankshaft. The coated construction provides superior protection during cold starts when oil pressure builds gradually, preventing metal-to-metal contact that causes premature wear. Specifically sized for 350-specification main journals, these bearings deliver precise tolerances necessary for optimal oil clearance—typically in the 0.0015–0.0025-inch range depending on crankshaft finish and bearing grade. The coating also improves corrosion resistance and allows the bearing set to accommodate various crank materials, from stock cast iron to premium forged units, making it versatile across different SBC engine configurations.

This bearing set is ideal for both experienced engine builders and restoration enthusiasts tackling SBC projects where reliability and longevity are non-negotiable. Installation requires proper torque sequencing, accurate main cap bolts, and verification of crankshaft run-out to maximize bearing life and engine performance. Compatible exclusively with Small Block Chevrolet engines featuring 350 main journals—including 262, 267, 305, 327, 350, and 400 cubic inch applications that share the same main diameter. Proper pre-lubrication of bearing surfaces before engine start-up is critical to prevent startup wear, and many builders apply assembly lube or priming oil to bearing faces during initial installation to ensure immediate oil film formation.