O.S. Flex Pipe FS70-91S/70U/FL70/FS81A/FS110 145 mm....

O.S. Flex Pipe FS70-91S/70U/FL70/FS81A/FS110 195 mm....

The raw power to exploit a split-second opportunity is there, tempered by the ability to fine-tune and finesse throttle control to the needs of different tracks and situations. And to help keep the 21VZ-B V-Spec-T (P) at the peak of its power, O.S. has given it a billet aluminum piston, hardened ABC...

Original OS 46/55-AX silencer type E3070 with allen screws....

Golden Age appearance — modern-day power! It's the second in the O.S. "V" series of 4-strokes, an engine that blends cutting-edge performance with the looks of a '30s-era power plant. And with the nostalgic looks, the FS-62V also includes a Jet Stream muffler to complement true-scale appearance ...

Golden Age appearance — modern-day power! It's the second in the O.S. "V" series of 4-strokes, an engine that blends Broad power band for a wide variety of airplanes including models designed for .60 2-stroke and .90 4-stroke engines Redesigned cylinder head to match angled valve layout for stead...