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Designed specifically for Spec class dirt oval racing
lightweight 1
Spur Gear: 37T
Aluminum swashplate and rotor head block for durability and precision
MST FXX-D Aluminum Gear Ration Adjuster (Red) - MXS-210337R 605482142165 Designed specifically for Spec classMST FXX D Aluminum Gear Ration Adjuster (Red) MXS 210337R The MST FXX D Aluminum Gear Ration Adjuster is an upgrade for the FXX D and FMX D models. The machined aluminum option will help to provide a rigid structure for the drivetrain increasing durability and chassis rigidity, while the available color options will give your ride a custom look that cannot be matched by the stock parts.
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