ACL Bearings 6B1238A-20 Connecting Rod Bearing Set Oversize - 0.020

The ACL Bearings 6B1238A-20 is a 0.020" oversized connecting rod bearing set designed for high-performance and racing applications where crankshaft journals have been machined or ground. ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world, delivering the precision and durability needed for demanding builds.

Advanced Trimetal Construction:

• Trimetal design features a high-strength overlay plate with reduced thickness for improved fatigue resistance, backed by hardened steel for enhanced support and retention under extreme conditions
• Hardened steel backs on all rod bearings to improve the support of the bearing lining and assist with bearing retention in the housing
• Elimination of flash plating on the back of the bearings to improve heat transfer through the bearings and to maximize the grip between the bearings and its housing
• Tight consistent wall tolerances to help maintain consistent clearances

Performance Engineering Features:

• Increased eccentricity to compensate for bore distortion at high rpm and to assist in the formation of hydrodynamic oil films
• Enlarged ID chamfers on bearing edges where required to accommodate large fillet radius on performance crankshafts
• 0.020" oversize dimension for precise fitment on machined crankshaft journals

Race Series rod and main bearings are standard components in Race engines that have set records and won championships from Mexico to Bonneville, providing endurance and capability to perform where others cannot. Perfect for street performance, drag racing, road racing, and other high-stress motorsports applications.