Traxxas 8581X aluminum differential carrier for the Traxxas Unlimited Desert Racer. Includes x-ring gaskets (2)/ ring gear gasket/ 14.5x20 TW (2). Use Traxxas stock and hop-up replacement parts to get the most out of your Traxxas RTR vehicles. This product is made from high quality materials and designed for long-lasting performance. This is replacement hardware for use on Traxxas vehicles; consult your user's manual for exact parts listings.