King Engine Bearings General Motors 262/ 267/ 302/ 307/ 327/ 350 (Size STDX) Main Bearing Set

This is a King Engine Bearings Main Bearing Set, part number MB557GPCSTDX. You get the main bearings needed to rebuild the crankshaft main journals for a variety of General Motors V8 engines, including those with displacements from 262 to 350 cubic inches. These bearings are specifically sized STDX, which means they are 0.001 inch undersize on the main bore diameter and 0.001 inch undersize on the crank journal diameter compared to standard specifications. This sizing is often used when the engine block or crankshaft journals have been machined to a slightly smaller diameter than stock during a rebuild.

King Engine Bearings uses a multi-layer bearing technology that combines a steel backing for strength with a specialized overlay material for improved wear resistance and compatibility with various oil types. The STDX sizing is a notable feature, indicating a precise approach to engine rebuilding where minor adjustments to journal or bore dimensions are necessary. This set is built to handle the demands of performance applications and everyday driving, ensuring solid support for your engine's rotating assembly.