{"product_id":"dg508-ignition-coil-sp479-double-iridium-spark-plug-kit-reliable","title":"DG508 Ignition Coil \u0026 SP479 Double Iridium Spark Plug Kit - Reliable","description":"\u003cp\u003eIn this review of the DG508 Ignition Coil \u0026amp; SP479 Double Iridium Spark Plug kit, the bottom line is simple: this pack is for owners of older Ford trucks and vans who need a direct-fit ignition upgrade that balances longevity and cost. The kit includes eight ignition coil packs and eight double iridium spark plugs, and its single biggest selling point is compatibility across a wide range of Ford 4.6L, 5.4L and 6.8L engines from the late 1990s through 2012, making it a practical one-stop replacement for multi-cylinder maintenance. Installation is straightforward for a DIYer and the parts match OE designs for a mostly trouble-free swap.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide vehicle coverage:\u003c\/strong\u003e Fits many Ford models including F-150, E-Series, Expedition and Mustang across 1997-2012, reducing the need to source individual parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete 8-cylinder kit:\u003c\/strong\u003e Includes eight ignition coil packs and eight double iridium spark plugs so an entire bank or full engine can be serviced at once.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble iridium spark plugs:\u003c\/strong\u003e Designed for extended life and consistent spark performance to help with cold starts and steady combustion over long service intervals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOE-matching ignition coils:\u003c\/strong\u003e Coils are built to match or improve on original equipment fit and connection, with thermoplastic connectors and internal ferrite noise suppression for reliable operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved fuel economy potential:\u003c\/strong\u003e Replacing worn coils and plugs often reduces misfires and can restore fuel efficiency and engine smoothness.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis kit is best for DIY mechanics, fleet owners, and anyone maintaining Ford V8 and V10 engines who need a full set of coils and plugs that directly replace common OE numbers like DG508 and FD503. It suits people working on F-150, F-250, F-350, E-150, E-250, E-350, Expedition, Mustang and similar models within the listed years.\u003c\/p\u003e\u003cp\u003eIt is less suitable for drivers who only need a single coil or a single plug replacement, or for owners of later-model vehicles outside the stated 1997-2012 compatibility. Buyers who require OEM-branded packaging or included installation manuals should note that a manual is not provided in the package.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect-fit replacement across many Ford engines simplifies a full-engine service.\u003c\/li\u003e\n\u003cli\u003eDouble iridium plugs offer long life and consistent ignition performance.\u003c\/li\u003e\n\u003cli\u003eCustomers report improved fuel economy and quick installation, indicating good build quality and fit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSpark plug durability received mixed feedback from some users, so longevity may vary by use and conditions.\u003c\/li\u003e\n\u003cli\u003ePackage does not include an instruction manual, which may challenge less experienced installers.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eContents\u003c\/td\u003e\n\u003ctd\u003e8 Ignition Coil Packs, 8 Double Iridium Spark Plugs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Engines\u003c\/td\u003e\n\u003ctd\u003eFord 4.6L, 5.4L, 6.8L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVehicle Years\u003c\/td\u003e\n\u003ctd\u003eFits many models from 1997 to 2012\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOE \/ Replace Numbers\u003c\/td\u003e\n\u003ctd\u003eDG508, FD503 and multiple listed OE numbers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpark Plug Type\u003c\/td\u003e\n\u003ctd\u003eDouble Iridium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoil Features\u003c\/td\u003e\n\u003ctd\u003eThermoplastic connector, ferrite noise suppressor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year product service\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe DG508 + SP479 kit is a sensible value for owners who need a full ignition coil and spark plug replacement for older Ford V8\/V10 engines. It offers OE-matching coils and long-life iridium plugs that can restore smooth idle and improve fuel efficiency, making it a practical, cost-effective choice for DIY maintenance or fleet servicing, provided buyers accept that plug longevity may vary and no manual is included.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit fit my Ford F-150?\u003c\/strong\u003e\u003cbr\u003eIt fits many F-150 model years with 4.6L and 5.4L engines within the 1997-2012 range; check vehicle fit in the product images and part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the spark plugs long lasting?\u003c\/strong\u003e\u003cbr\u003eThe plugs are double iridium and designed for extended life, though some users report mixed longevity depending on driving and conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation difficult?\u003c\/strong\u003e\u003cbr\u003eMost users find installation straightforward and report quick swap times, but an instruction manual is not included so basic mechanical experience is helpful.\u003c\/p\u003e","brand":"X4XZ","offers":[{"title":"Default Title","offer_id":48162483011803,"sku":"B0D629DMW8","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71Qh8woZYhL._AC_SL1500.jpg?v=1769165924","url":"https:\/\/gearmusthave.com\/products\/dg508-ignition-coil-sp479-double-iridium-spark-plug-kit-reliable","provider":"GearMustHave","version":"1.0","type":"link"}