engine set - Standard - Center Bearing only Starting in mid-1992, Mitsubishi no longer sold main bearings for the 4G63 engines in complete engine sets. From this point on, the main bearings were sold in "2-shell" sets (one for each of the 5 main crankshaft bearings). 1 of this set (the center main bearing that is flanged for crankshaft thrust) and 4 of MD 195906 are required to make 1 "engine set" at the dealer. Please be aware of this info when comparing the dealer's price and the price of WORLDPAC'S complete main bearing set #MS-1827A/STD. - Standard - Exc. Center Bearing Starting in mid-1992, Mitsubishi no longer sold main bearings for the 4G63 engines in complete engine sets. From this point on, the main bearings were sold in "2-shell" sets (one for each of the 5 main crankshaft bearings). 4 of this set and 1 of MD 195911 (the center main bearing that is flanged for crankshaft thrust) are required to make 1 "engine set" at the dealer. Please be aware of this info when comparing the dealer's price and the price of WORLDPAC'S complete main bearing set #MS-1827A/STD. -