{"product_id":"ignition-coil-iridium-spark-plugs-for-ford-f-250-2008-2010-5-4l","title":"Ignition Coil + Iridium Spark Plugs for Ford F-250 (2008-2010) 5.4L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Iridium Spark Plug Kit for 2008-2010 Ford F-250\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Direct-Fit Ignition Coil and Iridium Spark Plug Kit replaces degraded factory secondary ignition components on the 2008-2010 Ford F-250 to eliminate under-load misfires and restore combustion efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford F-250 Secondary Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e5.4L Triton 3V\u003c\/strong\u003e Modular V8 engine within the \u003cstrong\u003eP356\u003c\/strong\u003e platform exposes ignition coils to intense cylinder head thermal cycling. Over continuous towing cycles, the OEM epoxy breakdown in factory units like \u003cstrong\u003e8L3Z12029A\u003c\/strong\u003e induces internal dielectric failure, causing secondary voltage leakage. Concurrently, standard spark plug electrodes erode, expanding gap tolerances. This elevated resistance strains the secondary ignition windings, causing hesitation, rough idle, poor fuel economy, and persistent P0300 through P0308 trouble codes under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered for high-duty cycles, these coil-on-plug (COP) units feature vacuum-poured dielectric epoxy and high-conductivity copper windings designed to resist thermal degradation. Reinforced silicone boots prevent high-voltage arcing to the plug wells. Paired with fine-wire iridium spark plugs, the laser-welded electrode design minimizes spark quenching and maintains precise gap tolerances under severe combustion temperatures. The resulting high-energy arc guarantees rapid flame kernel propagation, complete fuel burn, and consistent spark stability under heavy load demands.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\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;\"\u003e2008-2010 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 SOHC \/ P356\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;\"\u003e8L3Z12029A, DG521, FD509, C1659, 5C1716\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2008 Ford F-250 Super Duty 5.4L V8 (XL, XLT, Lariat, FX4, King Ranch)\u003c\/li\u003e\n  \u003cli\u003e2009 Ford F-250 Super Duty 5.4L V8 (XL, XLT, Lariat, FX4, King Ranch, Cabela's)\u003c\/li\u003e\n  \u003cli\u003e2010 Ford F-250 Super Duty 5.4L V8 (XL, XLT, Lariat, King Ranch, Cabela's)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the P356 F-250?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2008-2010 Ford F-250 equipped with the 5.4L Triton 3V engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these coils designed for the revised brown-boot cylinder head design?\u003c\/strong\u003e\u003cbr\u003e Yes, this kit matches the late-style spark plug and coil design introduced mid-model year 2008 featuring standard 12mm spark plug threads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Heavy-Duty Durability Standard\u003c\/h3\u003e\n\u003cp\u003eHeavy towing and sustained payload hauling place immense strain on your Super Duty's ignition performance. Refreshing with high-dielectric coils and erosion-resistant iridium plugs ensures consistent cylinder pressure delivery and reliable towing output under extreme commercial work cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50623708528888,"sku":"DS-E7SF7W7D2","price":175.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-for-ford-f-250-2008-2010-5-4l-1.jpg?v=1790298348","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-iridium-spark-plugs-for-ford-f-250-2008-2010-5-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}