‚óŹApply to 90 size helicopters, according to the strength character of 90 engine to design, features much increase the horsepower, fuel-saving, low noise, and the highest air exhaust volume on the market.
‚óŹGreat 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.
‚óŹUse for O.S 91SR/HZ & ALIGN 91H/HP engine. ‚óŹSize:ő¶49.1 x 318 x 81.75mm
‚óŹPressure nipple x1
‚óŹExhaust guide x1(ő¶13.5xő¶18.5x79.75mm)
‚óŹCollar screw x2(M4x45mm)
‚óŹSpring Washer x2