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Summit Racing Part Number:
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Steeda speedometer plugs cover up the mechanical speedometer gear access hole in the new TKO 500 and TKO 600 transmissions, so they can be used on 1999 and later Mustangs with electronic speedometer pickups. The new TKO transmissions are equipped with dual speedometer pickups to work with either electronic or mechanical speedometer pickups. A plug is required to cover the mechanical access hole if it is not being used. The plugs also fit most common Ford transmissions, such as the T-5 and T-45, and are designed for use on race cars without speedometers.