ACL Bearings 5M8312HO/S2-STD Race Series Main Bearing Set with +.002in Oversized Housing

The ACL Bearings 5M8312HO/S2-STD is a high-performance Race Series main bearing set engineered for Subaru FA20, FA24, FB20, FB25, and Toyota 4U-GSE engines. This standard size bearing set features a +.002 inch outside diameter (S2 designation) for optimized fit and increased crush to ensure secure bearing retention in the housing.

Key Features:

• Race Series F780 bearing material for superior strength and durability
• Identical bearing halves for simplified installation
• Shaft size range: 2.6766" to 2.6775" (67.985mm to 68.009mm)
• Tunnel size range: 2.876" to 2.8766" (73.051mm to 73.067mm)
• Vertical oil clearance: 0.00138" to 0.00217" (0.035mm to 0.055mm)
• Wall thickness at crown: 2.53mm for optimal strength
• Enhanced oil groove design for improved oil distribution and pressure management
• Increased eccentricity for better shape adaptation under load

ACL bearings deliver enhanced material quality, dynamic thickness control, and optimized heat conduction, making them ideal for performance engine builds and racing applications. These bearings are trusted components in championship-winning race engines across multiple motorsports disciplines.