Product Details:

Product:
Package:
Instructions:	Specification:
?Apply 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. ?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. ?Use for O.S 91SR/HZ & ALIGN 91H/HP engine.	?Size:Φ49.1 x 318 x 81.75mm ?Weight:260g
	Accessories:
	?Pressure nipple x1 ?Exhaust guide x1(Φ13.5xΦ18.5x79.75mm) ?Spacer x2 ?Collar screw x2(M4x40mm) ?Spring Washer x2 ?Strap x 1(100mm)