S&S Cycle SS31-4499 Full Complement Inner Camshaft Bearings for Twin Cam 07-17/Dyna 2006A high strength, precision made replacement for the stock camshaft inner bearings that were prone to failure on 2006 2017 big twin oem engines. Recommended when installing cams, these high performance camshaft inner needle bearings for 2006 2017 big twin engines and S&S late style T Series engines replace oem p n 9198.