Review on Ignition Coil Pack Set of 6 - Compatible with Ford, Mercury, Mazda & Lincoln Vehicles - 3.5L, 3.7L V6 - Edge, F150, Explorer, Mustang, Taurus X, MKZ - Replaces OEM Numbers: 7T4E-12A375-EE, DG520, 7T4Z12029E, DG-520 by Steve Rohde

High quality for the price. In combination with the new spark plugs, my Ford Edge has noticeably increased performance and eliminated the engine overvoltage problem. They were easy to install (after removing the manifold on the rear three). Be sure to apply a light coat of dielectric grease to the inside of the boot but not to the metal inside or the tip of the spark plug as this will create too much drag and long term problems. I restarted the computer, discharged the capacitors, and then let the computer relearn (there are videos online for this process). This should be done after any serious work or when the battery is dead. The real test is how long they last. the time will show.