Scitoo High Performance Ignition Coil For Ford Lincoln Mercury 4.6L 5.4L V8 V10 Dg508 COP9 FD503 F523 FD493 C566 5C1412 GN10164 1L2U12029AA 1L2U12A366A DG-467 DG-473 DG-508 DG-491 Resists corrosion and abrasion,Durable and reliable under extreme conditions Provide excellent starting connections.