King Engine Bearings MB5013XP Main Bearing Set - LS Series Gen III/IV XP-Series Standard

The King Engine Bearings MB5013XP is an XP-Series main bearing set designed specifically for GM Vortec/LS-Series Gen III and Gen IV engines. This complete engine set delivers extreme performance capability for high-load capacity applications where durability and reliability are critical.

XP-Series Technology:

King XP-Series bearings feature advanced tri-metal copper-lead construction engineered for the most demanding racing environments. These bearings are specifically designed for use with aftermarket crankshafts that have large radii at the journal edges. The XP-Series features enlarged, chamfered oil holes with 1/2 grooving on the main bearings, providing uncompromised lower bearing load capacity while maintaining optimal oil flow to critical engine components.

Key Features:

• Tri-metal copper-lead construction for extreme performance applications
• Enlarged, chamfered oil holes designed for aftermarket cranks with large radii
• 1/2 groove design maximizes lower bearing load capacity
• Standard size bearings for proper OE crankshaft journal dimensions
• Complete main bearing set for simplified installation
• Engineered for high-load circle track and endurance racing

Applications:

Ideal for circle track racing, road racing, endurance events, and other high-load, extended-duration applications where bearing survival under sustained stress is essential. Perfect for blown, turbocharged, and high-RPM LS builds that see continuous high loads.

Note: The term "Standard" refers to bearings sized for use with crankshafts that have OE journal dimensions. "Undersize" bearings are thicker and used when the crankshaft has been machined undersize. Always verify your crankshaft journal dimensions before ordering.