This is the Traxxas Maxx Slash Aluminum Motor Mounts in Blue.
Add strength and style to your Maxx® Slash® with this aluminum motor cradle. The motor cradle is machined from tough 6061-T6 aluminum for unbeatable toughness with a brilliant anodized finish. Combine the cradle with the 10263-series aluminum motor mount cap for a winning combination. Genuine Traxxas accessories are made by Traxxas, for Traxxas, to guarantee a perfect factory fit every time.
Motor mounts (front & rear) (blue-anodized 6061-T6 aluminum)/ 3x10mm CCS (with threadlock) (4)/ 4x12mm BCS (with threadlock) (2) (for use with #3483 motor)