For selecting a speedometer, what information should I have ready when contacting a distributor or sales rep?

1. You need to know the MPH or KPH range that you want
2. Do you want an electric or a mechanical speedometer
3. The point of takeoff and it's characteristics (transmission tailshaft output). If the output is mechanical, use a Hall Effect sender. If the output works with a magnetic pickup - the number of lobes ("teeth") on the tailshaft must be determined (usually it is 16), so that the programmable speedometer can be properly programmed.
4. Do you require lighting in the instrument
5. Are you running on a 12V or 24V system
6. Diameter of the opening the instrument will be mounted in
7. What type of environment will the instrument be used in (eg: highway; high moisture; off-road; etc)

If you wish to match the style of existing instruments you should also have the following:

1. If your current instruments are a Stewart Warner line, which line (Seaworthy, Heavy Duty Plus, etc) (see the Stewart Warner Products page for the product lines)
2. Bezel color wanted (black, polished, etc)
3. Dial face and graphics (black dial, white numbers, SAE symbols, etc)
4. Pointer type and color (eg: red with black hub)

Installation instructions come with each speedometer.