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Ford Mustang Speed Calibrator & Gear Kit


Wanting to change your rear-end gear ratio but worried about your speedometer being accurate? Don't wish to spend tons of money on a tuner? Well then this kit was designed with you in mind! Multiply your gear ratio without breaking the bank.Designed by a American Muscle forum user, this kit provides you with nothing but the best of the best in products; the Dallas Mustang Speedcal, Ford Racing 3.73 Gears, and 3 Royal Purple 75w90 Gear Oils. Everything that you need for your rear end upgrade is provided for you, all you need to do is add the mechanic and the need to get through that quarter-mile faster.Note: The Dallas Mustang Speedcal will only work with 1994-2004 manual transmissions and 1994-1998 automatic transmissions. This gear kit is for the 8.8" Ford Rear End.

Available in these options:
  • Speed Calibrator & 3.73 Gear Kit [Part Number: 99100]
  • Speed Calibrator & 4.10 Gear Kit [Part Number: 99101]
  • Was: $322.99
    Sale: $279.99


    Available in: 3.73 & 4.10 Gear Kit
    Fits: 1994-2004 Ford Mustang


    Professional Installation is Recommended.

    Ford Mustang Speed Calibrator & Gear Kit Fits:
  • 1994-2004 Ford Mustang
  • Details

    • 642936
    • 642936
    • AM Custom
    • New

    Shipping Information

    • Item Requires Shipping
    • $29.99