King Engine Bearings MB 509XP Main Bearing Set Chevy 400 V8 XP-Series Standard

The King Engine Bearings MB 509XP is a high-performance main bearing set designed specifically for the Chevrolet 400 cubic inch V8 engine. This XP-Series bearing set represents King's top-tier solution for extreme performance applications where maximum load capacity and durability are critical.

XP-Series Technology:

King XP-Series bearings feature advanced tri-metal copper-lead construction engineered for the most demanding high-load applications. These bearings are specifically designed for use with crankshafts featuring large radii and incorporate enlarged, chamfered oil holes with half-groove design on the main bearings. This unique configuration ensures uncompromised lower bearing load capacity while maintaining optimal oil flow to critical surfaces.

Key Features:

• Tri-metal copper-lead bearing material for extreme performance capability
• Standard size bearings for use with OE specification crankshaft journals
• Enlarged and chamfered oil holes for improved lubrication flow
• Half-groove design optimizes load capacity on lower bearing shell
• Engineered for crankshafts with large radius journal edges
• Complete main bearing set for Chevrolet 400 V8 engines

Ideal Applications:

The XP-Series is specifically engineered for high-load circle track racing and endurance applications where sustained high RPM operation and extreme cylinder pressures demand maximum bearing durability. These bearings excel in road racing, oval track competition, marine performance, and any application requiring extended high-load operation.

This is a standard size bearing set designed for use with unmodified or OE-specification crankshaft journals. If your crankshaft has been machined undersize, you will need to select the appropriate undersize bearing set to match your journal diameter.