Hobby RC Gas/Nitro Engines for OS Airplanes
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Best selling
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Review highlights
Recommended by our customersvery good Piston Ring
By phatvu11
It is a good Piston Ring, it is fit exactly into the piston see all reviews
Verified PurchaseOS 55AX
By leadville
First off I haven't started this engine yet so my impressions are just out of the box. I've been into RC airplanes sinc... see all reviews
Verified PurchaseA very good engine
By mrjrschmidt
OS make a good and reliable engine it is a little more in price than some knock offs but it does a much better job in pe... see all reviews
Verified Purchase
