2-Pack HobbyPark Aluminum Electric Motor Heat Sink Cooling Fins for RS540 550 540 3650 Size RC Parts

I put these on all my rc's that don't have heat sinks and they fit great, I just wish they had a different color so they could match my cars. Like why blue? Black would fit literally any RC car color scheme.They function great and definitely stop some overheating.

Well its pack of 2 - half. So if you want two of these heat sinks, you need to buy 2 packs or 4 pieces. Anyway I made it work, it fits ok, not perfect but does a decent job.

Perfect. Couldn't ask for any improvements. Added for extra cooling without a fan.

I received these on time and they fit perfectly on my TRX4 Bronco motor but not on the Redcat Gen7 Pro without covering the vent holes on the motor. The metal casing surrounding the gearbox and motor prevents a perfect fit but no big deal - it can be modified.I like how the fins on the heat sink allow for a good fit in tight spaces...in most cases. The heat sink is flush with the motor so no need for thermal paste or adhesives. Great product!

Jammed these onto my trx4 stock motor (550 reverse) and I like to think it runs a little cooler now. They are light weight and very blue making my blue zip ties pop like I like. Blue zip ties are a must for cable management home depot gots the blues.They stay on pretty snug but pop off pretty easy at the same time. It's weird, I don't see them coming off unless I flip it hard and then we got other problems to prioritize before heat sinks. I like that the fins are large on one half and thin out on the other so you can jam this thing into the most unheatsinkable crevasses.Also careful they are sharp too. Ouch!

This is on a Traxxas Slash with the Castle SCT 3800kv motor and Hot Racing transmission. I got tired of replacing Castle fans so I hope this will do well (along with proper gearing). This fits the motor but not necessarily the setup. As you may be able to see I had to trim/Dremel five of the larger fins to fit but it snapped right on with very little gap and doesn’t feel like it’ll pop off. I was planning on updating after my son runs it for a bit.

Added this to a Traxxas 4wd Rustler car. It just snaps over the motor casing. The sink keeps the motor much cooler after a full 3S battery is run and then allows much faster return to the track. I have not yet found a way to fit it to a 2wd Slash.

These did not fit on le Tamiya grasshopper motor. Rs 540. Not enough space between motor and tail fin area. I bet they’d look awesome on it though. Instead they look awesome on a parts shelf right now.

Fits perfectly on a 550 size motor as well

Good quality product.