OS / YS 0.91グローヘリコプターエンジン用高品質のヘリコプターマフラー

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Certified Buyer Rated

Aug 10, 2016

Works realy good in my trex700 n and OS 91hz. Great quality cost ratio. Pretty similar to hatori 933 for 1/3 the cost. It makes great power at good temp .

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Customer Rated

Aug 10, 2014

great muffler fit on my YS .91 Although In a raptor 90 3D I had to cut out a notch in part of the frame rail. To clear the top left header adaptor . Engine runs strong sounds good looks great. Added bonus is the awesome price :)

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Customer Rated

Jul 31, 2013

High Quality Helicopter Muffler for OS/YS .91 Glow Helicopter Engines.



is this the same as Hatori 939 and is it made the Hatori looks the same same fitting kit??

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Customer Rated

Apr 26, 2013

The exercise price ratio compared with Hatori 939 align and I can only recommend testing with the engine align 91H 20 pcnt nitro complete satisfaction for 3 D

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Certified Buyer Rated

Jul 30, 2012

It adds extreme performance to my T-rex 700 with ys91 sr motor.