ACL Bearings 5M7299HX-STD Race Series Main Bearing Set for Chevy LS Gen III/IV

The ACL Bearings 5M7299HX-STD is a high-performance Race Series main bearing set designed specifically for Chevrolet GM LS V8 Gen III and Gen IV engines. This standard size bearing set features ACL's advanced trimetal construction with F780 bearing material, engineered to deliver exceptional durability and performance in high-RPM conditions.

Key Features:

• Standard size main bearing set with upper and lower halves
• F780 trimetal bearing material for superior strength and durability
• Hardened steel backs to improve bearing lining support and retention
• Reduced thickness high-strength overlay plate for improved fatigue properties
• Increased crush for improved bearing retention in the housing
• Elimination of flash plating on bearing backs to improve heat transfer
• Increased eccentricity to compensate for bore distortion at high RPM
• Tight consistent wall tolerances for maintaining proper clearances

Technical Specifications:

• Maximum shaft size: 2.5593 inches (65.007mm)
• Minimum shaft size: 2.5588 inches (64.993mm)
• Maximum tunnel size: 2.7515 inches (69.887mm)
• Minimum tunnel size: 2.7509 inches (69.873mm)
• Maximum vertical oil clearance: 0.0028 inches (0.071mm)
• Minimum vertical oil clearance: 0.0012 inches (0.031mm)
• Maximum wall thickness at crown: 0.0952 inches (2.417mm)
• Maximum overall length: 0.8051 inches (20.45mm)

ACL Race Series bearings are manufactured to exacting tolerances with particular attention to wall thickness accuracy, making them the choice of professional engine builders and racers worldwide. These bearings are designed for tuning and engine upgrades where superior quality and higher bearing capacity are required compared to standard OEM bearings.