ARRMA Motor Heatsink 4074, ARA390299

This works like it should especially when combined with a fan. Definitely lowered the motor temps on a Keaton 6s

Very tight fit which is great for the heat transfer but was slightly tricky to get on. Seen several other designs and still choose the factory heat sink. Married up nicely with a hyperflow fan using a printed adapter.

I like that all parts fit.

I installed this on my Arrma Notorious 6S V5. It took some time to install as this is a very tight fit, but definitely reduces the motor heat by several degrees after strong runs. It did want I was expecting. Nice upgrade. I also purchased for my Arrma Kraton 6S V5.

With slight modification on the plastic center gearing cover it fits perfectly. But you have to shorten one of the pegs as shown in the photo. Other than that it's perfect. Clip holds on well for now.

Fit my arrma Kraton 6s motor perfectly.

Works as it should

It takes a little elbow grease to fit this on, but once it is on you know it will stay on because it was designed specifically on the Spektrum Firma 4074 2050Kv Brushless Motor.Attach the clip to the underside of the heat sink, and then squeeze the heat sink over the motor with firm but gentle pressure. Once you install a fan you will notice how much cooler your motor will run.

Robusto ottima qualità che si paga che dire è ARRMA.

Great factory Arrma part to mount cooling fans to