{"product_id":"detyi-ignition-coil-pack-iridium-spark-plug-kit-8-coil-8-plug-direct-fit-for-ford-4-6l-5-4l","title":"DETYI Ignition Coil Pack \u0026 Iridium Spark Plug Kit, 8-Coil\/8-Plug Direct-Fit for Ford 4.6L\/5.4L","description":"\u003cp\u003e\u003cstrong\u003eDETYI's DG508 ignition coil pack and SP479 iridium spark plug kit is a complete eight-coil, eight-plug ignition tune-up designed to restore reliable spark and smoother performance for compatible Ford, Lincoln, and Mercury V8 engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis all-in-one set pairs eight DG508 high‑heat ignition coils with eight SP479 iridium spark plugs so you can replace the entire ignition bank in one service. Engineered as direct replacements for many Ford 4.6L and 5.4L V8 applications, the combo eliminates gradual power loss from worn coils and plugs and reduces the need for multiple part numbers during maintenance. Each spark plug comes pre-gapped and each coil features reinforced insulation, cutting down installation time while improving long-term durability.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles and engines will this kit fit?\u003c\/h3\u003e\n\u003cp\u003eThis kit is built to match a broad range of Ford, Lincoln and Mercury vehicles that use the DG508-style coils and SP479 plug. Fitment covers select 4.6L and 5.4L V8 engines across trucks, vans, SUVs and performance models from the late 1990s through the mid 2010s.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSelected Ford F-150, F-250, F-350 years and engine sizes (4.6L \u0026amp; 5.4L).\u003c\/li\u003e\n  \u003cli\u003eMultiple Econoline vans and E-Series models (E-150\/E-250\/E-350, Excursion).\u003c\/li\u003e\n  \u003cli\u003ePassenger cars and SUVs like Mustang, Crown Victoria, Expedition, Navigator, Mountaineer.\u003c\/li\u003e\n  \u003cli\u003eSee parts interchange list for replaced OEM numbers (e.g., 1L2Z12029AA, F7TU12A336CB, SP479).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does upgrading to DG508 coils and SP479 iridium plugs improve performance?\u003c\/h3\u003e\n\u003cp\u003eReplacing worn coils and plugs with matched components restores ignition consistency and can reduce misfires, rough idling and inefficient combustion. Iridium tips require less voltage to fire and resist erosion, while the coils are built to tolerate heat and vibration common to V8 installations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSmoother throttle response and more consistent starting under load.\u003c\/li\u003e\n  \u003cli\u003eReduced misfire incidents and more complete fuel burn.\u003c\/li\u003e\n  \u003cli\u003eImproved long-term reliability thanks to iridium electrodes and heat-resistant coil housing.\u003c\/li\u003e\n  \u003cli\u003eFull-bank replacement prevents uneven cylinder performance from mixed-age parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs installation difficult and what comes ready-to-use?\u003c\/h3\u003e\n\u003cp\u003eThe kit is intended as a direct-fit replacement so no fabrication or special tools are required beyond standard hand tools. Each spark plug is pre-gapped and coils are molded to OEM-style boots for a secure fit, making the swap faster for DIY mechanics and professional technicians alike.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePre-gapped SP479 iridium plugs ready for immediate installation.\u003c\/li\u003e\n  \u003cli\u003eCoils with OE-style connectors and insulating boots for snug seating.\u003c\/li\u003e\n  \u003cli\u003eStandard hand tools suffice; torque to vehicle manufacturer specs.\u003c\/li\u003e\n  \u003cli\u003eReplace all eight coils and plugs together to avoid cylinder imbalance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat durability and quality features should I expect from this set?\u003c\/h3\u003e\n\u003cp\u003eBoth components are designed for endurance in high‑temperature V8 environments: coils use reinforced insulation to avoid cracking, and iridium spark plugs keep a stable spark longer than conventional plugs. The combination aims to extend service intervals and maintain stable ignition over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeat-resistant coil construction minimizes failure from thermal cycling.\u003c\/li\u003e\n  \u003cli\u003eIridium electrodes offer greater wear resistance than copper or platinum.\u003c\/li\u003e\n  \u003cli\u003eStable spark performance under heavy load and variable conditions.\u003c\/li\u003e\n  \u003cli\u003eComprehensive part number cross-references for straightforward replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The DETYI DG508 \u0026amp; SP479 kit is ideal for owners and technicians working on Ford-family V8 vehicles seeking a cost-effective full-bank ignition refresh. If you own a compatible F-150, Super Duty, Mustang, Expedition, Navigator, Crown Victoria, or Econoline\/E-Series vehicle and want a matched set that reduces installation time while improving ignition reliability, this eight-coil, eight-plug package is designed for your next tune-up.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this kit replace all eight coils and plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The set includes 8 DG508 ignition coils and 8 SP479 iridium spark plugs for a full-bank replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are the spark plugs pre-gapped?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The SP479 plugs come pre-gapped to match typical OEM specifications for quick installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DETYI","offers":[{"title":"Default Title","offer_id":67585683226809,"sku":"B0F3C9J8F5","price":154.75,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/detyi-dg508-sp479-front-packaging.jpg?v=1790475312","url":"https:\/\/redleafauto.ca\/products\/detyi-ignition-coil-pack-iridium-spark-plug-kit-8-coil-8-plug-direct-fit-for-ford-4-6l-5-4l","provider":"Redleaf Auto","version":"1.0","type":"link"}