Undersized. Crankshaft bearing race kit for M8 and TCB (Twin Cam Softail) model engines. Pinion race is undersized to allow service and re machining of pinion shaft when prior damage occurred such as race spinning on shaft. Kit includes right and left side (pinion shaft & sprocket shaft) crankshaft races with the left side thrust washers. These Feuling press on races have a precision ground outer diameter finish and are designed to be true to size producing the correct OD after proper press on installation. OEM replacement reference none.