- Apply to 50 size helicopters, according to the strength character of 50 engine to design, features the highest air exhaust volume on the market.
- 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.

- Size:Φ41.2 x 270 x 70.5mm

- Pressure nipple x1
- Tube stopper x1(Φ13xΦ16x18.5mm)
- exhaust guide x1(Φ16.5x79.75mm)
- Spacer x2
- Collar screw x2(M3x35mm)
-Spring Washer x2