Pack of 8 Curved Boot High Performance Ignition Coil for Ford Lincoln Mercury 4.6L 5.4L V8 Compatible with DG508 C1454 C1417 FD503 high performance version coils are better than normal version coils 10 to 15 percent more power than aging stock coils Provide excellent starting connections Ignition coils for Ford 4.6L 5.4L V8 DG457 DG472 DG491 CROWN VICTORIA EXPEDITION F-150 F-250 MUSTANG LINCOLN MERCURY EXPLORER DG-508 3W7Z-12029-AA FORD, LINCOLN, MERCURY, VPG owners please check fitment bar and description before you BUY IT as the ignition coil pack can change based on the year/ month of manufacture of your vehicle