What to do when a speedometer is inaccurate due to a change in tire size or rear axle ratio?  Install the Electronic Speed Adapter (ESA).  The ESA receives the current speedometer signal from the speed sensor and then outputs the correct signal to the speedometer.  The ESA has one of the widest pulse ranges available on the market today.  It is compatible with most cars and trucks. 

        It's a snap to install:  input, output, hot, ground.  Set the dip switches followng the Calibration Table on the installation instructions enclosed with your ESA and you're ready to go.  We have also provided instructions on our website.

        Call the APT Instruments tech line at 952-881-7095 to order.

$165 + s&h (quantity and dealer discounts available)

Also see - CableX  a simple solution for customers with mechanical speedometers in vehicles equipped with an electronic speedometer signal.

We accept Visa, MasterCard, money orders and checks.   Dealer purchase orders are accepted with prior approval.

Last modified: March 10, 2008