This bearing race is used to adapt the CE-8007 carrier bearing, CE-8008 carrier bearing, or any other 2.891" o.d. 9" Ford carrier bearing to a 3.250" carrier bearing bore gear case. This allows you to use a 28, 31, or 33 spline carrier in a big bearing gear case. Used in all 28, 31, 33 spline Currie High Pinion applications. Races sold each.