King Engine Bearings MB5220XP.026 pMax Black Race Main Bearing Set Subaru EJ20 EJ22 EJ25

The King Engine Bearings MB5220XP.026 is a high-performance Trimetal pMax Black main bearing set engineered for Subaru EJ-series engines built during the Phase 1 (1989–1998) production years. This set is specifically designed for engines with the thrust bearing located at the #3 position and carries an 0.026mm (0.001") oversize specification to accommodate lightly reconditioned crankshafts.

King's pMax Black technology features a proprietary black polymer overlay that dramatically reduces friction at startup and under high-load conditions. The Trimetal construction combines a steel backing, copper-lead or aluminum intermediate layer, and the advanced polymer surface coating — delivering exceptional wear resistance and conformability demanded by high-output and racing applications.

Key Features:

• pMax Black Polymer Overlay — reduces friction and improves wear resistance under extreme conditions
• Trimetal construction — steel-backed with intermediate layer and performance overlay for superior strength and durability
• Oversize specification: +0.026mm — engineered for use with reground crankshafts
• Thrust bearing integrated at #3 position — matches Phase 1 EJ-series engine architecture
• Designed for Subaru WRX/STI EJ20, EJ22, and EJ25 engines
• Suitable for high-performance street use, motorsport, and racing applications
• Manufactured to OEM tolerances and beyond for precise oil clearance control

King Engine Bearings is a globally recognized manufacturer trusted by professional race teams and engine builders worldwide. The MB5220XP.026 is an ideal choice for builders seeking race-grade reliability in Subaru EJ-series engine builds requiring an oversize main bearing set.