{"product_id":"ignition-coil-iridium-spark-plugs-for-ford-f-250-2008-2009-6-8l","title":"Ignition Coil + Iridium Spark Plugs for Ford F-250 (2008-2009) 6.8L","description":"\u003ch2\u003eDirect-Replacement Ignition Coil \u0026amp; Iridium Spark Plug Kit for 2008-2009 Ford F-250\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and iridium spark plug kit replaces aged factory secondary ignition components on the 2008-2009 Ford F-250 6.8L to eliminate high-load misfires and restore combustion efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Ford F-250 Thermal Breakdown and Voltage Leakage\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e6.8L Triton V10\u003c\/strong\u003e operates with high thermal loads inside deeply recessed spark plug wells. Over continuous thermal cycling, factory coil-on-plug (COP) epoxy housings develop micro-fractures, while the boots harden and oxidize. This allows secondary voltage to arc directly to the cylinder head rather than across the plug gap—especially under open-throttle towing when cylinder pressures peak. Concurrently, factory plugs experience ground electrode erosion, widening the gap and escalating the kilovolt demand past what degraded stock coils can reliably discharge.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive service kit replaces all 10 cylinders with heavy-duty coil packs and fine-wire iridium plugs. The ignition coils utilize high-dielectric epoxy potting and premium magnetic silicon steel cores to maximize primary-to-secondary energy transfer without thermal breakdown. Reinforced high-temp silicone boots with internal stainless steel springs prevent dielectric punch-through and flashover. The matched fine-wire iridium spark plugs feature laser-welded tips that lower ionization voltage requirements, reduce quench, and resist erosion during high-load, sustained duty cycles.\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;\"\u003e2008-2009 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;\"\u003e\n\u003cstrong\u003e6.8L Triton V10 (3V)\u003c\/strong\u003e \/ \u003cstrong\u003eP356\u003c\/strong\u003e\n\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;\"\u003e362 hp \/ 457 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;\"\u003e\n\u003cstrong\u003e8L3Z-12029-A\u003c\/strong\u003e, \u003cstrong\u003eDG521\u003c\/strong\u003e, \u003cstrong\u003eFD509\u003c\/strong\u003e, \u003cstrong\u003eC1659\u003c\/strong\u003e\n\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 6.8L V10 Triton 3-Valve\u003c\/li\u003e\n  \u003cli\u003e2009 Ford F-250 Super Duty 6.8L V10 Triton 3-Valve\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 2008-2009 Ford F-250 equipped with the \u003cstrong\u003e6.8L Triton V10\u003c\/strong\u003e 3-valve engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these configured for the brown-boot design used on late 3-valve heads?\u003c\/strong\u003e\u003cbr\u003e Yes, these units feature the revised boot length and angle matching \u003cstrong\u003e8L3Z-12029-A\u003c\/strong\u003e specifications for post-mid-2008 revised head castings.\u003c\/p\u003e\n\n\u003ch3\u003eThe Ford Super Duty Towing Standard\u003c\/h3\u003e\n\u003cp\u003eWhen hauling maximum payload or towing heavy trailers, steady spark delivery is mandatory to keep exhaust gas temperatures controlled and maintain torque across the rev range. This kit provides factory-spec fitment and robust heat resistance designed for severe heavy-truck operating environments.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50623708397816,"sku":"DS-ENQ25EHHR","price":216.95,"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-250-2008-2009-6-8l-1.jpg?v=1790298310","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-iridium-spark-plugs-for-ford-f-250-2008-2009-6-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}