ACL VW 4 1595-1781-1984cc 1983 on Engine Crankshaft Main Bearing Set - 5M1644A-.50

This Main Bearing Set include 6 bearings with oil grooves and 4 without. The #4 journal will receive the oil groove on both sides of the journal, the rest have a grooved bearing on the block side only. See shell diagrams showing #4