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Set. Engine and Mufler. The O. S. 55HZ-H Hyper Ringed Heli engine is cause to rejoice for 3D heli fliers! The 55-HZ-H Hyper Ringed engine cranks out optimum power with a minimum of space! The PowerBoost Pipe 50/55 is a first from O.S. – designed especially for helis, improving efficiency and power while featuring a compact size. It also fits the 50SX-H Hyper Ringed heli engine.
This tuned muffler is developed for 3D Flight, 53-56 Engines, Not usable for 50 Engine. Designed and produced for Power-Range of 16,500-20,000rpm
SPECIFICATIONS Stock Number: OSMG1955 Displacement: 0.55 cu in (8.93 cc) Bore: 0.91 in (23 mm) Stroke: 0.85 in (21.5 mm) Practical rpm: 2,000-20,000 Power Output: 2.1 hp @ 17,000 rpm Weight: 14.39 oz (408 g)