King Engine Bearings MB5799XPG0.25 Main Bearing Set Tri-Metal pMaxBlack

The King Engine Bearings MB5799XPG0.25 is a high-performance main bearing set engineered specifically for Subaru FA20 and Toyota 4U-GSE engines. This oversized bearing set features .005" oversize housing dimensions to accommodate machined or worn engine blocks, ensuring proper oil clearances and optimal bearing crush.

Key Features:

• Tri-metal race bearing construction with pMaxBlack™ overlay technology
• Proprietary non-scaled hardening process for superior load capacity
• Designed for high-performance and racing applications
• Oversized housing bore: .005" larger than standard
• Direct replacement for worn or machined engine blocks
• Compatible with Subaru FA20 engines (BRZ, WRX) and Toyota 4U-GSE engines

King's pMaxBlack™ overlay represents advanced bearing technology developed specifically for race engines. The unique tri-metal structure combines a steel backing with a performance intermediate layer and a specially hardened overlay that resists fatigue and wear under extreme loads and temperatures. This bearing set is ideal for rebuilt racing engines, high-performance street builds, and applications requiring oversized bearings due to block machining or wear.