Look inside most winning Indy cars and NASCAR vehicles and youll find Clevite engine bearings. Since the development of the first precision insert-type bearing in 1929, Clevite bearings set the pace for engineering quality, and today they exceed industry standards for strength and durability. Most Clevite performance bearings use a special TriMetal design, first developed 50 years ago and perfected over time. 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. Karl Performance also has other Clevite engine components like pistons, rings, and cam lifters, all manufactured to the same high standards.