90FS-3D・4　 Helicopter tuned Muffler for 3D (#939)

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.

#939
Front Head
OS91HZ
OS91HZ-PS
OS91HZ-R
Muffler & Header Weight　238g

Line Break - Medium Blue

90FS-3D・4　 Helicopter tuned Muffler for 3D (#946)

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.

#946
Front Head
YS91SRX-TAREQ
YS91SRS
YS91SR-3DS
Muffler & Header Weight 238g

Source: Hatori

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