TAMIYA M03M Low-Profile Motor Heatsink M03M-21/SI by 3Racing  [M03M-21/SI]

Cooling add-on matched to TAMIYA M03M

The M03M-21/SI heatsink is a low-profile cooling accessory created to mount on motors configured for the TAMIYA M03M chassis. Its purpose is straightforward: improve heat dispersion from the motor can during longer practice laps or heavier running conditions.

Designed around the M03M motor position, the heatsink sits close to the can without disturbing the spur and pinion engagement when clearance is correct. Check the motor can diameter and surrounding parts before tightening, and keep battery and ESC wiring clear of the fin stack.

Fitting is practical for anyone used to compact touring car maintenance: remove the motor, fit the heatsink over the can where compatible, then re-secure using the motor clamp or existing mount. Recheck gear alignment and run brief tests to watch for contact or unusual vibration.

As part of a thermal plan, this heatsink lowers sustained temperatures so windings and magnets see less thermal stress, contributing to steadier performance across practice sessions. Combine with correct gearing and ESC settings for best results.