DE (drive end) Delco 10SI /12SI alternator casing with bearing

- precision die cast and machined alternator casting (front)
- complete with high quality 6203LLJ Japanese front bearing
- optional S6203RS ceramic bearing upgrade available
- used with Delco 10SI / 12SI winding (see listing)
- uses Delco 10SI / 12 SI rotor (with NdFeB magnet instead of excitation coil)

Note: there are significant technical advantages to upgrading this bearing to a ceramic bearing (silicon nitride), call for more info