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The FunTech A395 50 3D muffler not only works great on any 50 but is also ideal for the new OS 55 HZ Hyper motor. Local tesing of this muffler on the new 55 has been more than just satisfactory. Easy to tune on the 50 and just as easy on the 55. FunTech pipes are known for their wide range of engine tunability and ease of use. With a FunTech muffler on your heli, just add engine of choice and have fun. No more finicky issues to deal with. Smooth, consistent , durable, quiet power. Fun is in their name for a reason!
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