Clevite camshaft bearings are OE replacement parts that are finished to provide the recommended clearance right from the box. Designed to meet or exceed OE specification, materials will vary based upon the OE year, make and model. The seamless, 100 machined surface design provides the tightest tolerances in the industry. Clevite bimetal bearings are constructed of seamless steel tube with a thin layer of lead based Babbitt material Lead based Babbitt provides ideal properties for nearly all engine applications Manufactured to meet or exceed OE specifications