For sale is a set of Dura-bond CH-10 cam bearingsFits LS engines with 1st Design Position 1 and 5 Housing bore of 2.3260/2.3280.Great for Stock and Performance ApplicationsStandard SizeDura-bond seamless, 100% machined surface design provides the tightest tolerances in the industry. The centerless ground OD, centerless bored ID results in wall variations of less than .0004 inch. Dura-bond bimetal bearings are constructed of seamless steel tube with a thin layer of lead based Babbitt material. Seamless construction makes installation easy, eliminating breakage and bearing surface interruptions. Lead based Babbitt provides ideal properties for nearly all engine applications. Babbitt's superior embedability, conformability, and anti-seizure characteristics have proven to reduce engine failures that harder bearing materials can cause.