This aluminum motor heatsink keeps your motor running cool when the action heats up.
Overview
The ARRMA Motor Heatsink for 4x4 BLX 3S is an essential cooling accessory designed to keep your brushless RC motor running at peak performance during intense driving sessions. Whether you're bashing around the garden, competing on the track, or pushing your RC car UK to its limits, motor heat management is critical for reliability and longevity. This precision-engineered aluminium heatsink is specifically designed for ARRMA's 4x4 BLX platform, ensuring perfect fitment and maximum cooling efficiency when the action really heats up.
Built for enthusiasts who demand the best from their ready to run RC cars, this heatsink combines lightweight construction with sophisticated thermal management technology. The multi-fin design dramatically increases the surface area available for heat dissipation, pulling heat away from your motor core and maintaining optimal operating temperatures. Whether you're running short bursts or extended sessions, keeping your brushless motor cool extends component lifespan, maintains consistent performance, and prevents the thermal throttling that can slow you down during crucial moments in a race.
RC model enthusiasts across the UK trust ARRMA's commitment to quality and performance, and this motor heatsink exemplifies that dedication. The sleek black anodised finish with etched ARRMA logo looks the part whilst delivering serious cooling credentials. If you own an ARRMA 4x4 BLX 3S vehicle and want to maximise your motor's potential, this heatsink is a must-have upgrade that serious RC car enthusiasts recommend.
Key Features
- Precision manufactured aluminium construction — Engineered from high-quality, lightweight aluminium for maximum strength with minimal weight penalty, ensuring your motor cooling system doesn't compromise acceleration or handling characteristics of your RC vehicle.
- Multi-fin design for superior heat transfer — The carefully calculated fin geometry increases surface area exponentially compared to basic heatsinks, allowing ambient air to flow around the motor and carry away heat far more efficiently during high-speed runs and competitive racing.
- Black anodised finish with etched ARRMA logo — Not only does the professional black anodised coating protect the aluminium from corrosion and oxidation, it also looks absolutely stunning on your RC car, giving your setup a competition-grade appearance that matches ARRMA's quality standards.
- Flat mounting area for aftermarket fans — The thoughtfully designed flat surface allows you to bolt on optional cooling fans for enhanced thermal management in extreme conditions, giving you upgrade flexibility for summer racing or enclosed track environments where air circulation is limited.
- Perfect fitment for ARRMA 4x4 BLX models — Specifically engineered to mount seamlessly on compatible ARRMA 4x4 vehicles, eliminating fitment guesswork and ensuring the heatsink sits precisely where it needs to for optimal airflow and cooling performance around your brushless motor.
Technical Performance
This motor heatsink represents ARRMA's commitment to engineering excellence. Constructed from premium lightweight aluminium, the heatsink weighs minimal grams whilst providing substantial cooling capability. The multi-fin architecture is the key to its performance — rather than relying on a simple solid design, the fins create multiple air channels that dramatically increase the contact area between the motor and surrounding air. During typical RC car UK driving conditions, airflow across these fins removes heat continuously, maintaining your brushless motor in the optimal temperature range of 40-80°C depending on your driving style and ambient temperature. The black anodised finish doesn't just look professional; it also provides superior corrosion resistance, particularly important if you're running your RC car in wet conditions or storing it in UK garages where humidity can be significant. The flat upper surface is engineered to accommodate standard fan mounting patterns, allowing integration of active cooling solutions. Whether you're running a stock motor or upgraded brushless unit in your ARRMA 4x4 BLX, the heatsink's geometry ensures it doesn't interfere with drivetrain components whilst providing maximum thermal contact with your motor can.
What's in the Box
Frequently Asked Questions
- Is this motor heatsink compatible with all ARRMA 4x4 BLX models? — This heatsink is specifically designed for ARRMA 4x4 BLX 3S vehicles. It is confirmed compatible with the ARRMA Kraton 4x4 4S V2 BLX Speed Monster Truck RTR. We recommend checking the product compatibility list or contacting our team to confirm fitment with your specific model before ordering, as ARRMA has various 4x4 configurations.
- Will this heatsink fit my standard motor without modification? — The heatsink is precision manufactured for an excellent fit on ARRMA 4x4 BLX motors. It requires no modification and mounts directly to compatible vehicles. The engineering ensures the heatsink doesn't interfere with cooling fan operation or surrounding drivetrain components.
- Can I add a cooling fan to this heatsink? — Yes, that's one of the standout design features. The flat area on the heatsink's top surface is specifically designed to allow mounting of aftermarket fans. This gives you the flexibility to upgrade to active cooling if you're running in particularly hot conditions or pushing your RC car to competitive racing intensity.
- How much difference will a motor heatsink make to my RC car's performance? — A quality motor heatsink like this one maintains lower operating temperatures, which prevents thermal throttling and voltage sag that can occur when motors overheat. You'll notice more consistent acceleration and top speed throughout longer driving sessions, plus significantly extended motor lifespan. For RC enthusiasts who bash regularly or race competitively, heatsinks are proven performance upgrades.
- Is this suitable for beginners? — Absolutely. Whilst beginners might not initially appreciate the thermal management benefits, installing a heatsink is straightforward with no special tools required. It's an excellent first upgrade that teaches beginners about proactive maintenance and performance optimisation. Even if you're new to RC cars UK, this heatsink installs easily and delivers immediate tangible benefits.
- What is the weight of this heatsink? — The heatsink is manufactured from lightweight aluminium specifically to minimise impact on your vehicle's weight distribution and performance. Whilst exact weight isn't specified, the material choice ensures cooling capability without the weight penalties of steel or copper alternatives.
- Will the black anodised finish scratch during typical RC driving? — The anodised coating is durable and designed to withstand typical RC car use. Minor cosmetic marks may appear with heavy use, which is normal. The primary benefit of anodising isn't perfect aesthetics but rather corrosion resistance and protection of the underlying aluminium, particularly in UK's variable weather conditions.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the ARRMA Motor Heatsink: 4x4 BLX 3S today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or get in touch — we look forward to helping you get the most out of your RC experience.
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
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- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
