8 Pack DG511 Ignition Coil Heavy Engine Straight Boot Ignition Coil Pack for Ford F150 Expedition V8 4.6L 5.4L 2004-2008 Compatible Part# DG511 FD508 UF537 C1659 C1541 Ignition coil are 100% brand new and never used or installed.Compatible part number:DG511 FD508 UF537 C1659 C1541 DQ50101D GN10182 5C1584 50082 E508 11ICPA548 3L3Z12029BA 3L3E12A366CA 3L3U12A366BB More 15% energy than regular ignition coils,Quality insulation epoxy internal construction.Superior quality part with durable copper wire inside,OE+ durability. All coils are 100% factory tested,built to strict quality control standards. Ready to use,meet or exceed old/stock ignition coil direct replacement,2 pins connectors,Life time warranty. New dg511 ignition coils are engineered specifically for Ford 3 valve modular engines 4.6L 5.4L 2004 - 2008.