The SPEEDBOX from Speedhut is designed to operate cable-driven speedometers using modern speed-sending electrical signals. The compact conversion device measures 3.7 by 1.9 by 5.1 inches and is installed in the engine compartment or under the dash. The SPEEDBOX requires no calibration and accepts GPS, CANbus, transmission or ECM speed-sending signals. Speedometers from USDM Ford, GM and Chrysler products are accommodated.

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