This is the Essentials* bearing kit by Avid RC for the Sworkz S12-2C/D.
*The Essentials kit removes the bearings below that don't typically need replacing: (SB12-2C Full Kit & SB12-2D Full Kit)
(2) 3x6 - Ackermann Plate
(4) 5x8 - Steering Rack
S12-2C/D | Essentials