ACL Bearings 7M8103HC-.025 Race Series Main Bearing Set Oversize - 0.025mm

The ACL Race Series 7M8103HC-.025 is a high-performance main bearing set designed for demanding applications in Toyota and Lexus 3.0L engines. This set features a 0.025mm oversize specification for use with reground crankshafts or worn engine blocks requiring precision clearance restoration.

Tri-Metal Construction:

• High-strength steel backing plate for maximum structural support and bearing retention
• Copper intermediate layer providing improved malleability and heat dissipation
• Lead-tin babbitt overlay for superior seizure resistance and low friction operation
• Calico CT-1 dry film lubricant coating for enhanced protection during startup and intermittent lubrication conditions

Race Series Performance Features:

• Increased crush for improved bearing retention through higher radial contact pressures
• Enhanced heat dissipation characteristics to withstand extreme operating temperatures
• Precision machined to micron-level tolerances for consistent wall thickness and crush
• Increased eccentricity to compensate for bore distortion at high RPM
• Hardened steel backing on all bearings for superior lining support
• Optimized oil groove configuration for maximum load-carrying surface area

ACL Race Series bearings are proven components in championship-winning race engines across multiple motorsports disciplines, from drift racing to NASCAR competitions. The unique combination of advanced metallurgy, precision engineering, and performance-oriented design delivers the endurance and reliability required for high-RPM, high-boost applications where standard bearings cannot survive.