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O.S. Engines was the first to introduce a mass-produced 4-stroke engine, an innovator in every phase of R/C engine production. O.S. also retains a tradition of craftsmanship that pays off in durability and power. Each new engine is the product of over two years of testing and design-and more than two generations of R/C engine experience. O.S. Engines carries engines for cars and buggies, airplanes, helicopters, and boats. O.S. Engines-the first choice for quality, durability, and performance.
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