Clevite® H-Series performance bearings have a medium level of eccentricity, high crush, and a hardened steel back and thin overlay. These bearings are made without flash plating for better seating. Use H-Series bearings with crankshafts that have oversize fillets and where engines run in the medium to high RPM range. PartNumber : cleCB1663H Description : Engine Connecting Rod Bearing Pair Bearing Item Grade : High Performance Engine Components::Bearings