GENUINE NGK SPARK PLUGS . Plugs feature a fine-wire Iridium center electrode and Nickel-alloy ground electrodes for maximum engine horsepower and torque. 6 Spark Plugs. 2003 Ford F-150 4.2L V6. 2005-2007 Ford F-150 4.2L V6.
These great plugs are not always easy to find. I could not find them locally. But they are great. Good provider, good delivery. Using them on my 1987 John Deere 316 tractor. Good burns on older equipment, long life, good option for older machines. Thanks for reading and good luck!