Gear-X K-Series Mainshaft
Part Number: AC-1101A

Gear-X K-Series Mainshaft
    Some images may be for reference only

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    Will It Fit Your Vehicle?


    The Gear-X mainshaft requires that you use the Gear-X 1st gear and Gear-X 2nd gear.

    This mainshaft will not work with OEM 1st or 2nd gears.

    The first gear ratio is 2.3125 and the second gear ratio is 1.65. It is rated for up to 500 horsepower.

    This is the mainshaft from the Gear-X Drag Kit, Pro Spec I, Pro Spec II and Pro Spec III gear sets.

    The picture is shown with the first and second gears for the countershaft side but they are not included.


    Brand: Gear-X
    Part Number: AC-1101A
    Gear: 1st
    Gear Ratio: 2.3125 and 1.65
    Gear Type: Mainshaft

    Vehicle Fitment

    Acura RSX

    Honda Civic

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