They photo copy all of the specs for your year vehicle, cars, truck, taxis, etc.. It has engine specs, tranny, frame, rearend, body, suspension specs. It tells you how to decode the numbers, how to figure engine speed in different gears at different highway speeds. It's basically all of the technical info they have on your year vehicle. It includes diagrams a drawings. It's free to US citizens. Well worth a phone call. They will ask for your VIN "engine" number.
