hopsupRC VXL-3s ESC Motor Cooling Fan Heatsink Upgrade for Traxxas 1/10 Slash/Rustler/Stampede VXL 4WD 2WD, Aluminum High Velocity Fan, Green (Replaces #3340)

The hopsupRC VXL-3s ESC motor cooling fan and heatsink upgrade is a drop-in replacement part designed to improve thermal management on selected 1/10 scale Traxxas RC vehicles. This green aluminum heatsink uses a dual-fan setup to move air quickly across the ESC, helping keep temperatures in check during spirited runs. It fits both 4WD and 2WD VXL models from the Slash, Rustler, Stampede, and Bandit families, making it a versatile hop-up for owners of these popular cars.

Which RC cars does this cooling fan fit?

This heatsink and fan assembly directly replaces the stock cooling unit (part #3340) on the following Traxxas 1/10 platforms:

• Slash 4x4 / Slash 4x4 VXL
• Stampede 4x4 / Stampede 4x4 VXL
• Bandit 4x4 / Bandit 4x4 VXL
• Rustler 4x4 / Rustler 4x4 VXL
• Slash 2WD / Slash VXL 2WD
• Stampede 2WD / Stampede VXL 2WD
• Bandit 2WD / Bandit VXL 2WD
• Rustler 2WD / Rustler VXL 2WD

If your car uses the VXL-3s ESC and a 1/10 scale chassis, this upgrade is likely a direct fit.

Technical details

Build and performance

The heatsink is made from aluminum, a material chosen for its good thermal conductivity. It uses a pair of high-velocity fans that produce strong airflow across the ESC’s cooling fins. The fans run off the receiver or a separate BEC and are designed to stay quiet while moving a lot of air. The overall construction feels solid, with no sharp edges or loose parts.

This upgrade is meant to replace a worn or broken stock fan unit. By keeping the ESC cooler, it helps maintain consistent performance during long runs or in warm weather. The dual-fan design is especially useful if you run your car hard or have added heat-generating electronics.

Installation tips

Fitting this fan heatsink is straightforward. It mounts using the same screw holes as the original part. A special note: the manufacturer applies a small amount of screw glue in the screw holes to prevent the screws from vibrating loose during use. That means you may need a little extra torque the first time you install it, but it also means the assembly stays secure once tightened. No modification or soldering is required—just plug the fan connector into your receiver or a spare channel.

Common questions

Does this kit include the heatsink and both fans?

Yes, the item is a complete fan heatsink upgrade. It comes as one assembly with two fans mounted on an aluminum heatsink, ready to bolt onto your VXL-3s ESC.

Is this fan compatible with brushed motor systems?

The supplied information specifies it is designed for VXL-3s brushless ESC motor combos on the listed 1/10 scale Traxxas cars. Compatibility with other systems is not claimed.

Can I use this on a stock Traxxas ESC without upgrading the motor?

Yes. The fan heatsink replaces the stock cooling unit on the VXL-3s ESC, regardless of whether the motor is stock or upgraded. It directly swaps in place of part #3340.