O.S. PowerBoost Pipe/Muffler 90 Hyper for 90-class 3D Helicopters
OS PowerBoost Exhaust Pipe for the 91HZ-R and the 91HZ series Helicopter Engines.
The PowerBoost pipe 90 is a sliencer developed exclusively for 3D flights with 90 sized helicopter. It is the ideal exhaust pipe for OS Speed 91 HZR and 91 HZ series Helicopter Engines. This Sliencer delivers excellent high performance in th R.P.M. range used regularly in doing maneuvers, while it secures the stability in idlling and hovering.
FEATURES:
- Excellent performance from high RPM manuevers to idling and hovering
- Polished natural finish aluminum construction
INCLUDES:
- OS 90 3D PowerBoost Exhaust Pipe
- two M4 X 45 mm socket head cap screws
- two M4 Spring washers
- one M4 pressure nipple
- two M4 nut
- one Plug Screw M4X6
- Aluminum Gasket 0.5mm
- Exhaust Tube
- Binding Strap
- English instruction manual
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Helicopters 
