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About Gear-X B-Series Final Drives (YS1 / B16A / B18B) The Gear-X Final Drives for B-Series YS1 Cable, B16A Hydro, and B18 LS Hydro Transmissions are absolutely the best of the best. Manufactured from the finest forged chromoly steel and machined to exact tolerances, these gears will out perform and outlast any competing brands on the market. |