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:?49.1 x 318 x 81.75mm Weight:260g Accessories: Pressure nipple x1 Exhaust guide x1(?13.5x?18.5x79.75mm) Spacer x2 Collar screw x2(M4x40mm) Spring Washer x2 Strap x 1(100mm)" Nuova versione ,migliorata nel rendimento . |