Hatori 939 90FS-3D Helicopter tuned Muffler for 3D

This Tuned Pipe has been designed and produced for exclusively for 3D.
For 12,000-15,000rpm Maximum Power is available.
When the engine rpm is set for 15,000-16,000rpm and in event RPM decreased due 
to excess cyclic load,
the system will hold the intended RPM.

Muffler & Header Weight?232g

Suitable Engines:

OS91HZ
OS91HZ-PS
OS91HZ-R