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.