{"product_id":"mas-ignition-coils-spark-plugs-kit-set-of-8-dg511-coils-motorcraft-sp546-plugs-fits-ford-5-4l-v8-2004-2008","title":"MAS Ignition Coils \u0026 Spark Plugs Kit — Set of 8 DG511 Coils \u0026 Motorcraft SP546 Plugs, Fits Ford 5.4L V8 (2004–2008)","description":"\u003cp\u003e\u003cstrong\u003eMAS Set of 8 ignition coils DG511 with 8 Motorcraft spark plugs SP546\/SP515 is a complete replacement kit designed for Ford 5.4L V8 engines and compatible Lincoln models from mid-2000s.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement kit bundles eight MAS ignition coils (DG511\/FD508-compatible) and eight Motorcraft spark plugs (PZH14F\/SP546\/SP515 variants) so you can swap every cylinder component at once. It targets 2004–2008 Ford F-150 and F-Series Super Duty trucks, 2005–2008 Expeditions, and Lincoln Navigator\/Mark LT models with the 5.4L V8. The pack helps restore even firing and simplifies maintenance by using matched components selected to work together on the specified engines.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these coils and plugs fit my Ford or Lincoln 5.4L V8?\u003c\/h3\u003e\n\u003cp\u003eThe kit lists compatible model years and common OEM cross-reference numbers to help verify fitment. Use your vehicle year\/make\/model selector and compare original part numbers—especially if your engine uses different boot colors or coil variants. If your existing coils have brown boots, DG521 is the correct alternative instead of DG511.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 2004–2008 Ford F-150 5.4L V8 and 2005–2008 F-250\/F-350 Super Duty 5.4L V8\u003c\/li\u003e\n  \u003cli\u003eFits 2005–2008 Ford Expedition and Lincoln Navigator, 2006–2008 Lincoln Mark LT 5.4L V8\u003c\/li\u003e\n  \u003cli\u003eCross-references: 3L3U12A366BB, 3L3Z12029BA, DG511, FD508, PZH14F, HT15, PZT14F, SP515, SP546\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance or reliability benefits can I expect after installing the full set?\u003c\/h3\u003e\n\u003cp\u003eReplacing all eight coils and plugs together reduces misfires, rough idle, and inconsistent throttle response caused by degraded ignition parts. Using a matched set promotes uniform spark delivery across cylinders, which helps the engine run smoother and can improve starting consistency. It’s also easier diagnostically—if problems persist, they’re less likely due to mixed-age ignition components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores consistent spark timing across all cylinders\u003c\/li\u003e\n  \u003cli\u003eReduces misfire-related rough idling and hesitation\u003c\/li\u003e\n  \u003cli\u003eSimplifies troubleshooting by eliminating mixed-condition parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before ordering to avoid incorrect parts?\u003c\/h3\u003e\n\u003cp\u003eConfirm the part fitment with the year\/make\/model dropdown and compare the original coil boot color and part numbers. Some engines use visually similar variants; selecting the wrong coil boot type or a non-matching spark plug thread\/heat range can result in poor fit or performance. When in doubt, match your old coil imprint and the OEM cross-reference numbers listed with the kit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify your vehicle year, make, and model in the fitment selector\u003c\/li\u003e\n  \u003cli\u003eCompare existing coil numbers and boot color (brown boots require DG521)\u003c\/li\u003e\n  \u003cli\u003eConfirm spark plug thread size and recommended heat range against OEM specs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included and what warranty coverage comes with the kit?\u003c\/h3\u003e\n\u003cp\u003eThe package contains eight MAS ignition coils (DG511\/FD508 compatible) and eight Motorcraft spark plugs (SP546\/SP515\/PZH14F compatible), providing a full ignition set for V8 engines listed. MAS backs this kit with a one-year warranty against defects; keep records of purchase and fitment confirmation to streamline any warranty claim. Installation hardware or gaskets are not included, so have basic tools and replacement seals ready if necessary.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes: 8 MAS ignition coils + 8 Motorcraft spark plugs\u003c\/li\u003e\n  \u003cli\u003eCommon compatible part numbers provided for cross-checking\u003c\/li\u003e\n  \u003cli\u003eOne-year warranty from MAS on kit components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This kit is intended for owners and technicians working on mid-2000s Ford F-Series, Expedition, and Lincoln 5.4L V8 vehicles who want a matched, full-bank ignition replacement. It’s suited to anyone replacing worn coils or plugs, addressing misfires, or performing preventative maintenance. Make sure to verify your vehicle’s exact coil variant and original part numbers before purchase to ensure correct fitment.\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: Are these coils compatible with brown boot variants?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. If your original coils have brown boots you likely need the DG521 variant instead of the DG511 in this kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include a warranty?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. MAS provides a one-year warranty on the ignition coils and spark plugs included in this kit.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MAS","offers":[{"title":"Default Title","offer_id":55170912092503,"sku":"B071RPF4VR","price":226.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/mas-front-packaging-coils-plugs.jpg?v=1790435183","url":"https:\/\/britishgarage.co.uk\/products\/mas-ignition-coils-spark-plugs-kit-set-of-8-dg511-coils-motorcraft-sp546-plugs-fits-ford-5-4l-v8-2004-2008","provider":"British Garage","version":"1.0","type":"link"}