✔Compatible with: Fits a wide range of Ford vehicles from 1997-2012, including F-150, E-Series, and Excursion, with 4.6L, 5.4L, and 6.8L engines. Please see the second main picture for more vehicles before purchase. | ✔Excellent Function: A faulty ignition coil & spark plug may result in engine misfire, rough engine idle, decrease in power, poor fuel economy etc. Every component either matches or improves on the OE design to ensure fast and easy installation with superior performance and reliability, to provide superior cold-start performance and a smoother running engine. | ✔High-quality: The spark plug is double iridium spark plug, have a much longer working life, can work 100027 kilometers, consistent and stable spark. The ignition coil made of premium quality materials, stainless-steel spring with internal ferrite noise suppressor prevents radiofrequencyinterference, advanced thermoplastic coilconnector ensures proper connectionand resists fractures causedby heat and thermai cycling, to better transfer the high voltage created by the engine¡¯s spark plug. | ✔OE# DG508&SP479. Replace# DG508, FD503, FD503T, DG540, 3W7Z12029AA, 3W7Z12029AAE, SKIC001, GN10164, 1L2U12029AA, 1L2Z12029AA, 1L2U12A366A, 8W7E12A366AA, F7TZ12029AB, COP9, F7TZ12029CC, F7TZ12A366AB, 3W7E12A366AA, 3WTZ12029AA, F7TU12A366AB, F7TU12A366CB, F7TZ12029BA, F7TZ12029CA, F7TZ12A366BA,DG457?, DG467, DG473, DG481, FD493, DG491. Package included: Ignition Coil Packs x8, Double Iridium Spark Plug x8. Not included instruction manual, easy to install. | ✔After-Sales Service: We offer 24 hours customer service and 26 year product service, If you are encounter product installation, product quality and other problems, please feel free to contact us.