King Engine Bearings MB5804SM0.25 SM-Series Main Bearing Set Oversize - 0.25mm

The King Engine Bearings MB5804SM0.25 is a precision-engineered main bearing set designed for high-load and performance applications in Opel B16DTH, B16DTJ, and B16DTL engines. This set features a +0.25mm (.010 inch) oversize to accommodate machined crankshafts, making it ideal for engine rebuilds and performance upgrades.

SM-Series Construction:

• Steel backing for maximum strength and stability
• Aluminum bonding layer for superior adhesion
• Strengthened aluminum bearing alloy with manganese and chromium additives
• Bi-metal construction optimized for high-load applications

King Quality Standards:

• "Bull's Eye" bearing wall tolerance of +/- 0.0001 inch - far tighter than competitors
• Rigorous quality control checkpoints throughout production
• Proprietary manufacturing machinery for consistent precision
• Race-proven performance from aviation and motorsports applications

King Engine Bearings has specialized exclusively in engine bearings since 1960, making them a trusted choice for professional engine builders and performance enthusiasts. The SM-Series represents King's strongest aluminum-based bearing material, delivering exceptional durability and reliability in demanding engine environments.