Always the correct part
Velineon VXL-3 ESC Heat Sink, High Velocity Fan
This is the optional Aluminum Heat sink with Cooling Fan for the Traxxas Velineon
VXL-3 Electronic Speed control from Hot Racing
Screw Secure clamp on aluminum heat sink.
Added heat sink cooling area.
Mount higher to allow better airflow
High velocity Fan
Plug right in with the VXL-3S ESC.