Clevite engine bearings are found inside most winning Indy cars and NASCAR vehicles. Since the development of the first precision insert-type bearing in 1929, Clevite bearings set the pace for engineering quality. Clevite goes above and beyond industry standards for strength and durability. A special TriMetal design that has been perfected over time can be found in most Clevite performance bearings. A copper-lead alloy is added to a steel back, which is then electroplated with a white metal surface layer which produces an ideal degree of conformability, embedability, slipperiness, and fatigue resistance.