King Engine Bearings MB5209XP0.25 Main Bearing Set 0.25mm Undersize Mitsubishi 4G63 4G64

The King Engine Bearings MB5209XP0.25 is a complete main bearing set engineered for 1992-1997 Mitsubishi 4G63, 4G63T, and 4G64 engines with flanged main bearings. This 0.25mm undersize bearing set is designed for use with crankshafts that have been machined 0.25mm undersize during reconditioning.

XP-Series Performance Technology:

King's XP-Series bearings are specifically engineered for extreme performance and high-load capacity applications. These premium tri-metal copper-lead bearings feature an advanced design optimized for cranks with large fillet radii and narrow rod bearings. The enlarged, chamfered oil holes with half-groove configuration on main bearings ensure maximum oil delivery while maintaining critical lower bearing load capacity—making them ideal for high-load endurance applications, turbo builds, and racing environments.

Key Features:

• Tri-metal copper-lead construction for superior strength and durability
• 0.25mm undersize for machined crankshafts (thicker bearing for undersized crank journals)
• Enlarged, chamfered oil holes for enhanced lubrication
• Half-groove design on main bearings for optimized load distribution
• Flanged main bearing design for proper thrust control
• Complete engine set includes all main bearings required
• Engineered for high-load and endurance applications

Application:

Fits 1992-1997 Mitsubishi 4G63, 4G63T (turbocharged), and 4G64 engines equipped with flanged main bearings, including Mitsubishi Evolution I-IV models. The 0.25mm undersize specification indicates these bearings are thicker than standard to accommodate crankshafts that have been turned down 0.25mm during machining or reconditioning.

What's Included:

Complete main bearing set for one engine.