956 Crankcase bearing insert kit only

For those looking to beef up the bottom end of a Twin Cam, converting from the stock roller bearing to the earlier, more robust Timken-style bearing is a popular upgrade. This Jims crankcase bearing insert kit is the replacement insert for the 978517 tool kit. It is used during the conversion process on 2003 to 2017 Twin Cam models. This kit provides the necessary components to ensure the new bearing race is installed with the precision required for high-performance applications. It is a vital piece of hardware for engine builders who demand the highest level of durability from their crankcase assemblies.