Enhance the performance of your vehicle with these high-quality spark plugs from Autolite. Made of copper, they ensure durability and reliability. These standard configuration spark plugs have a thread diameter of 14 mm and a hex size of 16 mm. They fit perfectly in AMC Jeep Dodge Eagle Harley Davidson models and have OE/OEM part numbers like 5613717, 4318138, SP0RC12ECC, 56041402AB, 56027275. The installation depth is 19 mm, and the voltage is 12 V. These spark plugs are a perfect fit for your vehicle, ensuring optimal ignition system performance. Exact item set is shown. New old stock spark plugs wth original packaging. Spark Plug, Copper Core, Resistor, 14mm x 1.25, Gasket Seat, 0.750 in, Reach, Each. Made in USA. No returns on installed items or partial sets. Please review our business policies in our store for information regarding returns, shipping and warranties.