PLEASE READ!!! NOTE*** Some later model 2008 vehicles(Mustangs w/4.6L or Truck/SUV w/5.4L) may take a 12mm normal thread design plug depending on coil engineering number(8L3E) or "boot coil color". HT1 is a 16mm plug and will NOT work for this later model engine. For application/cross-reference info... please use the link below before purchasing. YOU'RE RESPONSIBLE FOR KNOWING WHETHER YOU NEED A 16MM OR 12MM THREAD PLUG BEFORE PURCHASING!

You're buying a set of EIGHT(8) "New & Improved w/ HSS/High Strength Steel design technology" Autolite HT15(OE Design) Revolution Platinum "16mm High Thread Design" spark plugs that may fit 2004-2008 Ford & Lincoln Trucks/SUV's with a V8-5.4L Triton 3-valve engines depending on application. Replaces Motorcraft SP-507, SP-515 or PZT14F. This plug is the "2-Piece" design and might require a special tool for installation. Contact your dealer for more info in regards to this process. For application/cross-reference info... please use the link below before purchasing.

Please ask any questions or click on http://www.autolite.com/productfinder to find out if this is the right plug for you.

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