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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:F41.2 x 270 x 70.5mmAccessories:Pressure nipple x1Tube stopper x1(F13xF16x18.5mm)exhaust guide x1(F16.5x79.75mm)Spacer x2Collar screw x2(M3x35mm)Spring Washer x2