BIG AUTOPARTS Set of 8 Curved Boot Ignition Coils High Performance Ignition Coil Pack for Ford Lincoln Mercury 4.6L 5.4L V8 C1454 C1417 FD503 DG508,Smart Yellow MORE ENRGY - High performance and durability TS16949 Certified Manufacturer,this yellow ignition coil has 15% more energy than other coils in the market. SUPERIOR QUALITY - These coil packs are of superior quality with ISO9001 Certifiedfor quality assurande. GOOD REPLACEMENT - Better acceleration a smoother idle and improved fuel mileage. NOTE - Ford ignition coil check the description or email to us to confirm the compatibility before purchase. COMPATIBLE MODES - Compatible to F523,5C1412,E213,E262,E409,52-1761,IC369,IC62,1L2U12029AA,1L2Z12029AA,1L5Z12029AA,3W7E12A366AA,3W7Z12029AA,F7TU12029BA,F7TU12A366AB,F7TU12A366BA,F7TZ12029AB,F7TZ12029BA,F7TZ12029CA,F7TZ12029CC,88921369,DG481,DG491,DG508, FD-493,FD-503,FD-507.