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CEO of Stirlingkit:Mona Cai


Telephone: +86 13927461642

WeChat: 13927461642

Company address:

No. 603, 6 / F, 3009 Banxuegang Avenue, Bantian, Longgang, Shenzhen, China

Business hours: Monday to Friday 09:00am-18:00 hours, Hong Kong Asia Time

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Based on 798 reviews

a big thanks to Stirlingkit. good quality and fast shipping. 5 stars.

Amazing Detail and engineering

Purchased the V8 Engine because I knew it would be challenging and it would take time to finish correctly. When the kit arrived (fast shipping) I was impressed with the metal packing container. All the parts are laid out and numbered which would be a critical part of the build. The instructions were very easy to read with diagrams for each part of the build. All the parts are metal and very well engineered to fit perfectly with no expense spared. As you build each part page by page, the instructions explains and shows where each part goes and the direction it is to be placed on the engine down to the last screw. The engineering and detail was amazing as every part fit perfectly and worked as it would in a real engine. All the parts moved as they should down to the last detail. There is even a water pump that has internal impellers that you can see as well as the pistons that you can see through the engine block cut outs. The engine is truly a great way to see how a real engine works and is very educational. Cant wait to build the next model engine!

great piece and price

16 bearings and thrust washer make it worth the money alone

Rc nitro

Llego a Puerto Rico en 4 dias habiles envio super rapido!!! buena comunicación.

Order defective.

The esc will not power up the motor and all programming was attempted several times and the rudder has a set pin for the steering rod. That was missing so now damage is beginning. This was and is an expensive water craft and I shouldn’t have to modify it fresh out of the box.

The engine's operability is not very well

The engine's operability is not very well designed.
The vertical configuration is nice and reduces friction but the flywheel is not balanced at all and the engine needs a lot of force to turn.
Too much force requires too much heating and heat dissipation is very poor. It's not just because it's vertical - even working lying down it also heats up a lot and stops after 3 minutes.
With an additional heatsink hugging the engine block, I can work for 10 minutes non-stop using 1 cm3 of 95% alcohol. The lamp is too big for this low consumption per operation.
Heat also passes to the cold zone because the displacer is hollow, the hot zone being separated from the cold zone only by a very thin wall.

Nice first flight

After unboxing I found the rudder servo was stripped out so I had to replace that...the easy was is to just cut it out and hot glue everything back into place...good as new...I replaced the reciever with a spekteum ar620 and used my nx8 flew didn't like high speed as it just wanted to dive...but it would cruise at 60% throttle and was smooth as butter....

V4 upgraded version is just awesome !!!

Yesterday the new upgraded FS-V400A beast arrived I did not have the time to start it up yet, but just by the looks and build quality that thing is awesome. Comes now in a wooden crate and with the integrated brushless starter-motor it´s now so much more compact and easier to install. I had to make a test-stand for it since that is now gone with the update but what are u gone do with it afterwards anyway. Can´t wait to build the pipes and all for it to hopefully soon precede the marriage with my 5th scale 1965 Mustang build project. I can highly recommend to anyone looking for excellent fast responding customer service.


Just received the box this morning. Nicely packed and secured.
Will take some more photos after opening it up.

Very fine Engine

This is a fine little machine that runs very well.
Very precisely assembled, is a lot of fun
and is also a collector's item.

Fun on a budget

All of the car is not as expensive as some others it still has good quality and if you're not a serious racer or competitive this car is just fine for a friend of the house or parking lot we can do the same thing as more expensive cars can do. Plus there is numerous parts and upgrades available and this brand has a big following on Facebook for which I joined great little car.

Great little engine

I enjoyed building this engine and I'm just waiting on the all in one starter unit to test 😉.

Great little 4 stroke engine

Fast delivery for France (received in a week !). Great little 4 stroke engine. It is really beautiful and super detailed. The parts, which compose it, have been CNC machined in brass and stainless steel. The machining quality is really impressive for the sale price ... It works very well with SP95 gasoline + 4% 2-stroke oil. I'm even thinking of recommending another to offer it!

Impeccable Quality and Attention to Detail!

This Engine is amazing and my second "hobby engine" in my new collection. I went to school for automotive repair, earned a degree and worked within the industry for more than a decade before retraining into a different career. This is the nicest piece of machinery I have seen in a long, long time. It is WOW! I CANNOT stress, as much as others have stated, how incredible the attention to detail on every piece is. A work of Art.

With that said, being classically trained how to build real sized engines, allowed me to build this one. The instructions are totally sub-par to the absolutely beautiful & helpful packaging the engine arrives in. Not what I expected from such a precise build. The instructions made putting this beautiful engine together like Ikea furniture, but it is an engine. No torque specs on an engine this precise? A lot of mis-prints on the instructions will have you scratching your head. It is nothing super crazy, but this is relative to my background and skill. Overall, instructions and complaining aside, swipe your card. Thank me (and others) later! Totally worth your time and money!

This product is awesome, it looks beautiful on my traxxas trx4 Bronco!!!!

besser als ich erwartet hatte

Dieser dünne Motor ist viel zu gut. Ich bereue es nicht, es gekauft zu haben. Diese Qualität und das vorsichtige Design verdienen einen solchen Preis. Ich habe Toyan seit Jahren verwendet. Sie überraschen mich immer wieder und hören auf unseren Vorschlag und verbessern ihn beim nächsten Mal. Ich würde es jedem empfehlen, der sich für RC-Motor interessiert.