10-0346 - Extreme Heavy Duty Left Side Main Bearing Kit

Extreme duty left side main bearing kit is for all 2003-UP Twin Cam and M8 models. Includes bearing spacer thrust washers and snap ring. When high-performance engine modifications are made the increased torque is transferred via the crankshaft to the drive system putting a significantly higher load on the bearing. The extreme duty bearing is case hardened on the inner and outer race to provide increased load capacity and enhanced durability in high-torque applications. Installed in the left side of the crank case and supports the output shaft to the primary drive system.