Product description:
- Apply to 50 size helicopters, according to the strength character of 50 engine to design, features the highest air exhaust volume on the market. And yes this was stolen from RCHeliResource.
- Great design and test to three spaces: expansion chamber, accelerated section, silencer chamber, high efficiency and the quick respond of medium speed and high speed, great for 3D flying. And yes this was stolen from RCHeliResource.
- Suitable for 50H,55H engine.
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