ACL Bearings 6M5563H-.25 Race Series Main Bearing Set Undersize - 0.25mm

The ACL Bearings 6M5563H-.25 is a high-performance Race Series main bearing set engineered for demanding applications in Audi 2.5L TFSI 5-cylinder engines. This undersize bearing set features a -.25mm designation, meaning the bearings are thicker than standard and designed for crankshafts that have been cut 0.25mm (.010") undersize. These tri-metal performance bearings deliver the durability and precision required for high-RPM racing and performance engine builds.

Key Features:

• High strength overlay plate with reduced thickness for improved fatigue properties
• Increased crush for improved bearing retention
• Elimination of flash plating on bearing backs to improve heat transfer and maximize grip in the housing
• Increased eccentricity to compensate for bore distortion at high RPM and assist in hydrodynamic oil film formation
• 3/4 grooved design to optimize bearing load carrying surface area and oil flow
• Tight consistent wall tolerances for maintaining precise clearances

The unique combination of design, metallurgy and engineering provides Race Series performance bearings with the endurance and capability to perform where others cannot. ACL Bearing Company is based in Australia and produces one of the largest lines of replacement automotive engine bearings, exporting to more than 55 countries. Ideal for high-performance street builds, racing applications, and engine rebuilds requiring undersize bearings for reground crankshafts.