The Tamiya 3451594 cooling fan post is an RC replacement designed to create a stable mounting point for a fan on 42391 TRF421X assemblies. It keeps the fan positioned correctly relative to the motor and electronics to control airflow on the TRF421X chassis.
Install this post when your factory mount is damaged or stripped, or when moving the fan to tune airflow. The sale includes only the fan post; confirm the package contents with the seller prior to purchase.
For setup and maintenance the post's purpose is simple: it secures fan location so you can tweak fan angle and clearance without altering other chassis parts, making swaps and service quicker at the track or in the workshop.
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