Compatible Products OS Engines Piston: 55HZ Hyper OSMG7538 is compatible with OSMG1955 (55HZ-H), OSMG1957 (55HZ-R)

The O.S. #8 glow plug is the most widely used O.S. glow plug.Recommended for most current O.S. (and other brands of) 2-stroke R/C engines. FEATURES: Medium heat range plug for most model engine applications.Plug is medium length, without idle bar. For all 2 stroke...

Compatible Products OS Engines Carburetor Retainer: 55HZ Hyper OSMG3649 is compatible with OSMG1955, OSMG1957

Compatible Products OS Engines Crankshaft: 105HZ OSMG4660 is compatible with OSMG1960, OSMG1961

Compatible Products OS Engines Gasket Head, .2mm: 105HZ OSMG6255 is compatible with OSMG1960, OSMG1961

Compatible Products OS Engines High Pressure Check Valve: 91HZ-R OSMG6007 is compatible with OSMG1957, OSMG1961

Compatible Products OS Engines Piston Pin: 55HZ Hyper OSMG7692 is compatible with OSMG1955, OSMG1957

Compatible Products OS Engines Piston Ring: 55HZ OSMG7798 is compatible with OSMG1955, OSMG1957

Compatible Products OS Engines Piston Ring: OSMG7812 is compatible with OSMG1960, OSMG1961 and OS108FSR

O.S. PowerBoost Pipe for 105HZ Engine

O.S.Engine Powerboost Pipe III 50/55HZ-H SPECS:Length: 11.1" (281mm)Diameter: 1.71" (43.6mm)Distance Between Muffler Mounting Hole Centers: 1.4" (37mm)Exhaust Outlet Diameter: 0.35" (9mm) REQUIRES:Silicone caulk to seal muffler to engine to prevent exhaust leak INCLUDES:Powerboost III Pipe with Metal GasketRubber Exhaust Tube, black in colorTwo M3x35mm...

OS Engines Ratchet Spring #7H #7D #2K OSMG8172 is compatible with these engine OSMG0016, OSMG0525, OSMG0548, OSMG0557, OSMG0660, OSMG0798, OSMG0878, OSMG0898, OSMG0991, OSMG1510, OSMG1513, OSMG1515, OSMG1621, OSMG1720, OSMG1961, OSMG2406, OSMG2421, OSMG2428, OSMG2432, OSMG2438, OSMG2442, OSMG2459, OSMG2460, OSMG2461, OSMG2466, OSMG2470, OSMG2479, OSMG2485, OSMG2494, OSMG2500, OSMG2505, OSMG2508, OSMG2512, OSMG2513, OSMG2516, OSMG2517, OSMG2523, OSMG2524, OSMG2525, OSMG2530, OSMG2531, OSMG2533, OSMG2535, OSMG2537, OSMG2538, OSMG2540, OSMG2545, OSMG2549, OSMG3669, OSMG3750, OSMG3785, OSMG4068, OSMG6997

Following the popularity of the 91HZ-R with On-Demand Regulator, O.S. has now taken high-performance, high-speed helicopter engines to the next stage of evolution. Introducing the 91HZ-R Speed Engines - based on the 91HZ-R, factory-tuned at the O.S./Japan facilities and guaranteed to blow you away!...