DG521 Ignition Coils & SP509 Double Iridium Spark Plugs for 09-14 Ford Expedition, 08-10 Ford Explorer/ F150/ F250/ F350/ Mustang, 98-99 08-14 Lincoln Navigator, 08-10 Mercury Mountaineer C1659 FD-509

Compatible with: For 2009-2014 Ford Expedition 5.4L V82008-2010 Ford Explorer 4.6L V82008-2010 Ford Explorer Sport Trac 4.6L V82008-2010 Ford F150 5.4L V82008-2010 Ford F250 Super Duty 5.4L V82008-2010 Ford F350 Super Duty 5.4L V82008-2010 Ford Mustang 4.6L V8. For 2008 Lincoln Mark LT 5.4L V82008-2014 Lincoln Navigator 5.4L V81998-1999 Lincoln Navigator 5.4L V8. For 2008-2010 Mercury Mountaineer 4.6L V8.
^^Excellent Function: A faulty ignition coil & spark plug may result in engine misfire, rough engine idle, decrease in power, poor fuel economy etc. Every component either matches or improves on the OE design to ensure fast and easy installation with superior performance and reliability, to provide superior cold-start performance and a smoother running engine.
^^High-quality: SP509 spark plug is double iridium spark plug, have a much longer working life, can work 100000 kilometers, consistent and stable spark. DG521 ignition coil made of premium quality materials, stainless-steel spring with internal ferrite noise suppressor prevents radio frequency interference, advanced thermoplastic coil connector ensures proper connection and resists fractures caused by heat and thermai cycling, to better transfer the high voltage created by the engine's spark plug.