These SBC cam bearings are a direct replacement, and will spread the load across the entire cam journal, unlike the stock bearings. Bi metal to support the roller cam profile and the load of higher spring pressure associated with performance cams. Regular SBC cam bearings are not designed for roller cams with stiff springs, and will crush when used with stiffer than stock valve springs.
Also available in a teflon coated version for extra insurance on cold starts or oil pump failure.
