... 6D155 is a heavy duty engine made by Komatsu, we can supply this einge bearing 5000 sets each year.The ... layer(copper-lead-tin) and then coverd with Tin.Main bearing, 14 pcs, OEM 6127-21-8070 (Daido No.:M878K, ... pcs narrow, half with hole/groove and half plain.Con rod bearing, 12 pcs. OEM 6127-31-3040(Daido No.: R878K, ... with hole/groove and half plain. main and con rod bearing for Komatsu 6D155, M878K