Amazon.com: Koyo Torrington B-138 (1) Inner Cam Bearing for
This is the only cam bearing you should use for your Single Cam! These are made in the United States! Koyo bought the Torrington needle bearing division from Timken in 2011, which acquired Torrington in 2003! The bearing offered is the B-138, which is suitable for Evolution Single Cam models from 1958 to 1999!