ACL Bearings 5M1139-1.00 Standard Size Main Bearing Set

The ACL Bearings 5M1139-1.00 is a high-performance main bearing set engineered for demanding engine applications. ACL Race Series bearings feature advanced tri-metal construction with a steel backing, copper-lead intermediate layer, and polymer coating for exceptional durability and friction reduction.

Key Features:

• Standard size main bearing set for precise OEM fitment
• Tri-metal construction provides superior strength and load capacity
• Polymer coating reduces friction and enhances oil retention
• Precision machined to tight tolerances for optimal clearances
• Suitable for high-performance street and racing applications
• Manufactured to meet or exceed OEM specifications

ACL Bearings are a trusted choice among engine builders and performance enthusiasts worldwide, offering reliability and performance for both street and track use. The 1.00mm oversize designation indicates this bearing set is designed for crankshafts that have been machined oversize.