King Engine Bearings MB7089XP XP Series Tri-Metal Racing Main Bearings

The King Engine Bearings MB7089XP XP Series main bearings are engineered for extreme high-performance racing applications that demand maximum load capacity and durability. Designed specifically for forged steel aftermarket crankshafts in high-load, long-duration racing environments including circle track, off-road, and offshore competition.

pMax Black Tri-Metal Technology:

These bearings feature King Racing's proprietary pMax Black tri-metal construction, which is 24% harder than conventional tri-metal race bearings. The enhanced copper-lead structure includes a nickel barrier layer and SecureBond adhesion process for superior stability between layers. A 0.0005" metallurgically hardened performance overlay provides exceptional resistance to surface fatigue and wear under extreme loads.

Key Performance Features:

• 15-30% Greater Load Capacity: Significantly exceeds traditional bearing load ratings for high-stress applications
• Bull's Eye Tolerance: Industry-leading wall thickness tolerances with all shells matched to 0.0001" for precise fitment
• Half-Grooved Main Design: Maintains uncompromised lower shell load capacity while ensuring proper oil distribution
• Enlarged Chamfered Oil Holes: Improved oil flow and bearing lubrication
• Medium Eccentricity: Optimizes load distribution across the bearing surface
• Narrowed Design: Accommodated for large-radius crankshaft applications
• SecureBond Adhesion: Prevents delamination between bearing layers under high stress and temperature

King Racing XP bearings are the choice of professional engine builders who require maximum durability and load capacity in the most demanding racing conditions. Each bearing set is precision-manufactured to deliver consistent performance and reliability at extreme RPMs and loads.