Rev Ignition High Performance Ignition Coil Set of 8 Ford 4.6 / 5.4 V8 SOHC FD503, DG508 F-150, Mustang COMPATIBLE Vehicles - SEE TABLE BELOW Our High Output Performance coils give you the bonus of 10-15% more spark for improved performance. They are designed to install with no modification required to your vehicles wiring. Improved Throttle Response, Improved Gas Mileage, Reduces Misfire 100% Copper Wire Assembly, Each Coil Factory Tested, Quality Guaranteed Compatible with OEM numbers: FD503T, FD504, C1139, C1417, C1454, IC62, 1L24-12029AA, DG467, DG472, DG491, F7TU-12A336-AB, F7TU-12A336-BA, F7TZ-12029-AB, F7TZ-12029BA, F7TZ-12029-CA, F7TZ-12029-CC, IL2U-12029-AA, IL2Z-12029-AA