{"product_id":"ignition-coil-spark-plugs-for-ford-f-250-2005-2007-5-4l","title":"Ignition Coil + Spark Plugs for Ford F-250 (2005-2007) 5.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Ignition Coil and Spark Plug Kit for 2005-2007 Ford F-250 (P221)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and spark plug kit replaces degraded factory ignition hardware on the 2005-2007 Ford F-250 5.4L to eliminate under-load spark blow-out and restore stable combustion under heavy hauling loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford F-250 Secondary Voltage Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e5.4L Triton 3V\u003c\/strong\u003e modular engine in the \u003cstrong\u003eP221\u003c\/strong\u003e chassis is notorious for ignition breakdown under high thermal stress. Factory \u003cstrong\u003eDG511\u003c\/strong\u003e \/ \u003cstrong\u003eFD508\u003c\/strong\u003e coil packs suffer from internal epoxy breakdown and boot dielectric failure, which allows high-voltage arc-through to the cylinder head rather than across the spark plug gap. Combined with electrode erosion on aging plugs, the increased resistance causes noticeable low-RPM bucking, misfires (DTC P0300-P0308), and unburned fuel entering the exhaust tract.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive tune-up kit replaces all eight cylinders simultaneously to balance secondary ignition output. The high-performance ignition coils feature reinforced copper primary and secondary windings encased in high-temp dielectric epoxy, eliminating internal shorting under thermal expansion. Paired with platinum-tipped spark plugs engineered for superior resistance to thermal erosion, this setup maintains consistent gap tolerances and optimizes spark duration for lean air-fuel mixtures during towing conditions.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e8 High Performance Ignition Coils (Replacement for FD508 \/ DG511)\u003c\/li\u003e\n  \u003cli\u003e8 Platinum Spark Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2005-2007 Ford F-250 Super Duty\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e5.4L Triton 3V V8 \/ P221\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e300 hp \/ 365 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eFD508, DG511\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2005-2007 Ford F-250 Super Duty 5.4L V8 (XL, XLT, Lariat, King Ranch)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the P221 F-250?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2005-2007 Ford F-250 equipped with the \u003cstrong\u003e5.4L Triton 3V\u003c\/strong\u003e engine. \u003cstrong\u003eThis kit does not fit 2-valve 5.4L engines, 6.8L V10, or Power Stroke diesel platforms.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eAre separate spark plug wires required for this installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this application utilizes a direct Coil-on-Plug (COP) configuration where the coil connects directly to the plug terminal without remote plug wires.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Workhorse Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle sustained operating temperatures and high duty cycles, this ignition package delivers the primary spark energy required to maintain heavy-duty towing reliability across demanding work environments.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67562625827064,"sku":"DS-ERQYKH56X","price":136.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-ford-f-250-2005-2007-5-4l-1.jpg?v=1790987286","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-spark-plugs-for-ford-f-250-2005-2007-5-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}