XPG Main Bearing Set

The KING BEARINGS XPG Main Bearing Set (MB5382XPG) is a precision-engineered bearing kit designed for Subaru 4-cylinder engines. This standard-specification bearing set delivers the OEM-grade dimensional accuracy and material composition required for dependable engine rebuilds and performance restoration across a wide range of Subaru four-cylinder platforms.

Main bearing sets are the critical interface between the crankshaft and engine block, responsible for supporting rotational loads while maintaining precise clearances under high operating pressures. The XPG specification indicates this kit meets the exact journal diameters, wall thickness, and crush values required for proper oil film development and load distribution. Selecting the correct main bearing set during engine rebuilding directly impacts oil pressure stability, bearing longevity, and overall engine reliability. The complete kit format ensures all bearing surfaces are matched as a set, eliminating compatibility guesswork during assembly.

This bearing kit serves engine builders, restoration shops, and enthusiasts performing full overhauls on Subaru 4-cylinder engines. Whether rebuilding a naturally aspirated powerplant or restoring a turbocharged platform, proper bearing selection is non-negotiable for engine longevity. The XPG Main Bearing Set is engineered to restore factory specifications and support both stock and mildly modified applications within OEM load parameters.

KING BEARINGS is recognized in the engine building community for precision bearing manufacturing that meets or exceeds OEM dimensional standards. When ordering bearing kits for engine assembly, confirming the exact engine code and year ensures proper fit and performance. TacticalSurplusUSA stocks the XPG specification to support Subaru engine rebuilds with verified OEM-compatible components.