Upgrade your vehicle's ignition system with this set of eight Autolite 5143 spark plugs. Specifically designed for Ford Ranger and Mustang L4 V6 models, these copper spark plugs come with interchangeable part numbers RS10LC and AGSF24C. With a thread diameter of 14mm and a hex size of 16mm, these spark plugs deliver reliable performance with a voltage of 12V. Their installation depth measures .708in, making them a perfect fit for your vehicle. Manufactured in the United States, these spark plugs are a top choice for car and truck enthusiasts.