YS Engines 91SR-X Piston & Liner Set
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This is a YS factory replacement Piston, Liner, and Piston Ring. This works with a wide variety of YS helicopter engines from older discontinued models, to current engines such as the 91 SR-3DS, 91 SRX Tareq, and 120 SR-X.
This product was added to our catalog on April 12, 2016.