King Engine Bearings MB5527XP05 XP Series Performance Main Bearing Set Toyota 4AGE 1.6L

The King Engine Bearings XP Series main bearing set is engineered for high-performance Toyota 4AGE and 4AGZE 16-valve 1.6L engines requiring extreme load capacity and durability. Designed for racing applications using forged steel aftermarket crankshafts, these tri-metal performance bearings deliver superior strength and reliability under sustained high-load conditions.

pMax Black Tri-Metal Technology:

The XP Series features King Racing's proprietary pMax Black tri-metal structure, which is 24% harder than conventional tri-metal race bearings. This enhanced copper-lead construction includes a nickel barrier and SecureBond adhesion process for superior layer stability. The 0.0005-inch metallurgically enhanced performance overlay provides exceptional load resistance and surface fatigue protection.

Key Performance Features:

• 15-30% Greater Load Capacity: Engineered to handle extreme racing loads far beyond standard bearings
• Bull's Eye Tolerance: Industry-leading wall tolerances with all shells matched to 0.0001 inch
• Half-Grooved Main Design: Uncompromised lower shell load capacity for maximum strength
• Increased Bearing Height: Improved bearing-to-bore contact enhances heat transfer and reduces spin risk at high RPM
• Enhanced Oiling: Enlarged, chamfered oil holes ensure optimal lubrication
• Medium Eccentricity: Optimizes load distribution and oil flow
• Narrowed Design: Accommodates large-radius performance crankshafts

Ideal Applications:

Perfect for high-load, long-duration racing including circle track, off-road, endurance racing, and other demanding motorsports applications requiring forged steel crankshafts. These bearings are specifically sized for 0.50mm undersize crankshaft journals.

King Engine Bearings are the choice of professional engine builders who demand precision, durability, and consistent performance under the most extreme racing conditions.