ACL race series connecting rod bearings STD w/.001 oil clearance for N54, N55, S55 engines

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 competitions. 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. The X signifies the set will give an extra .001 (.025 mm) oil clearance on a standard size shaft when compared to the H-STD set. The wall size of these HX-STD bearings is .0005 (.013mm) thinner than the H-STD Bearings, in all other respects the HX set is identical to the H-STD set.Material: Trimetal Size: StandardOil Clearance: +.001" ExtraOil Clearance: +.001" Extra