Our roller camshaft bearings are lower-friction bearings that only require splash oil lubrication. Oil feed holes can be totally blocked off, to reduce oil aeration and windage losses. Please note that all Eliminator performance blocks have provisions for roller cam bearing use: an oil groove is machine in #1 cam journal allowing oil to traverse behind #1 roller cam bearing, bringing oil to the distributor gear. Excellent for all performance applications. One set contains five (5) bearings.