Description:

[Vehicle Fitment-1]: Compatible with Ford Expedition 2005-2007 V8 5.4L, Expedition 2008 V8 5.4L, compatible with F-150 2004-2007 V8 5.4L, compatible with F-150 2008 V8 5.4L, compatible with F-250 Super Duty 2005-2008 V8 5.4L, compatible with F-350 Super Duty 2007-2008 V8 5.4L, compatible with F-350 Super Duty 2005-2006 V8 5.4L; Compatible with Lincoln Mark LT 2006-2008 V8 5.4L, Navigator 2005-2008 V8 5.4L. [Reference Number]: SP-546, SP-515, PZK14F, PZH14F, SP507. [Specifications]: Center Electrode Tip Material: Iridium; Center Electrode Core Material: Iridium; Hex Size (IN): 0.56; Insulator Height (mm): 2.51. [Exceptional Ignitability]: Designed alongside OEMs and engineered for maximum ignition performance. [Extensive Mileage Range]: For optimal engine performance and longevity, it is recommended to replace double iridium spark plugs at mileage intervals of 100,000 to 120,000 miles.