The Kyosho UM574B Gear Box Set is intended for modellers who maintain or improve the Ultima SB Dirt Master. It offers accurate part alignment and dependable mechanical behaviour specific to the Ultima SB range.
This gear box set is produced to maintain accurate gear mesh and resist wear under repeated stress. Its measured tolerances help preserve handling characteristics and drivetrain efficiency over time.
Whether you are refreshing worn elements or preparing the car for tougher events, the UM574B set installs cleanly and supports further drivetrain improvements while maintaining factory fitment standards.
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