This is the OS PowerBoost Exhaust Pipe for the OS Speed 91 HZR and 91 HZ series Helicopter Engines, Brand New in Box, Made in Japan.
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
