Yokomo Y2-501GSAA Aluminum drive cup for YD-2 Gear differential 橫崛   [Y2-501GSAA]

This is an aluminum gear differential drive cup that is standard equipment on the YD-2SX. A resin protector is attached to the dogbone side to minimize wear on the aluminum. It has less clearance and is also lighter than standard steel, which helps improve throttle response.