ACL Bearings 5M1644H-STD Race Series Main Bearing Set

The ACL Race Series engine main bearings are designed for high-performance race engines, specifically engineered for Volkswagen and Audi 4-cylinder engines ranging from 1.6L to 2.0L displacement. These race engine bearings feature trimetal construction with lead, tin, copper, and nickel for superior strength and seizure resistance.

Key Features:

• Multi-layered tri-metal copper alloy construction provides high strength and excellent seizure resistance
• Manufactured to exact tolerances ensuring a reliable fit and helping to maintain consistent clearances
• Improvements of material, dynamic thickness, heat conduction, oil grooves and oil distribution
• Standard bearing size (STD) with standard oil clearance
• Set includes 5 bearings with 1/2 groove, upper groove location
• Full groove on #4 position only, requires thrust washers
• Bearing material: F780 tri-metal construction

Main bearings are augmented with extended grooves, as well as other bearing enhancements, like increased crush, bearing eccentricity, and enlarged I.D. chamfers. Designed for high-performance engine builds, tuning applications, and racing where superior bearing capacity and reliability are essential.