*1939-40 Cadillac, 1940 LaSalle, state king pin diameter 7/8" $76 or 15/16" $80. Our King Pin sets are sold as pairs, and are the best quality around. Guaranteed for life! King Pins do not last forever and, in most cases, they will wear out before many of the other parts of your car need replacing. If you are rebuilding your front end to get your car back on the road, new King Pins are essential for the safety and longevity of your car. For a complete steering system rebuild, you will also need to replace your pitman arm, idler arm, center link, as well as tie rod ends with many cars. Check our store to see if we have everything you need!