Additional NotesDesigned to withstand higher RPM conditions these race bearings feature:- - 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. - Tight consistent wall tolerances to help you maintain consistent clearances.