Shop Nilight Ignition Coil Pack DG508 DG457 DG472 Straight Boot Ignition Coils Fit for Ford CROWN F150 F250 F350 450 EXPEDITION EXPLORER ECONOLINE EXCURSION 1998-2003 05-14 4.6L 5.4L V8 DG491 FD503(8 PCS) in high quality, support 2 Years Warranty. The silicone rubber boot of Nilight ignition coils packs contains silicone oil to make it easier for you to replace and install.