ACL - 6B1490H - BMW M20/M50/M52/M54 Conrod bearing set

Features:
High strength overlay plate with reduced thickness for improved fatigue properties
Hardened steel backs on all rod bearings to improve the support of the bearing lining and assist with bearing retention in the housing
Increased crush for improved bearing retention
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
Increased eccentricity to compensate for bore distortion at high rpm and to assist in the formation of hydrodynamic oil films
3/4 grooved Main Bearings to optimize bearing load carrying surface area and oil flow to the conrod bearings
Tight consistent wall tolerances to help you maintain consistent clearances
Enlarged ID chamfers on bearing edges where required to accommodate large fillet radius on performance crankshafts

ACL® Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world. Race Series rod and main bearings are standard components in race engines that have set records and won championships from Mexico to Bonneville - from sport compact drift racing to small block NASCAR, IHRA, and NHRA cmpetitions. The unique combination of design, metallurgy, and engineering provides Race Series performance bearings with the endurance and capability to perform where others cannot. These exceptional bearings are available for a variety of American, Asian, and European performance engines. more details on - https://www.carid.com/acl/race-series-connecting-rod-bearing-set.html


This bearing comes in multiple sizes which will be explained below:
"H" = Standard Size
"H-.25" = .25mm Thicker than stock. Use this when your crank is cut .010"
"H-.50" = .50mm Thicker than stock. Use this when your crank is cut .020"
"H-.025" = .025mm Thicker than stock. Use this when you need .001" less oil clearance.
"HX" = .025mm Thinner than stock. Use this when you need .001" more oil clearance.