Carrying on a tradition of durability and dependability, Clevite BiMetal (aluminum) engine bearings feature 100% lead-free aluminum silicon. Engineered with 60% more silicon than comparable competitive replacements, they provide better conditioning of journal surfaces. This results in greater seizure and wear resistance. PartNumber : cleCB967A50MM(4) Description : Engine Connecting Rod Bearing Set 1963-1964 Nissan 410 Base L4.1189cc Engine Components::Bearings 1965-1968 Nissan 520 Pickup Base L4.1299cc Engine Components::Bearings 1969 Nissan 521 Pickup Base L4.1299cc Engine Components::Bearings