{"product_id":"mas-ignition-coil-spark-plug-kit-8-pack-straight-boot-dg511-for-5-4l-v8-platinum-plugs","title":"MAS Ignition Coil \u0026 Spark Plug Kit, 8-PACK Straight-Boot DG511 for 5.4L V8 — Platinum Plugs","description":"\u003cp\u003e\u003cstrong\u003eMAS complete ignition kit pairs eight straight-boot DG511 ignition coils with eight Motorcraft platinum spark plugs to restore consistent spark for 5.4L Ford and Lincoln V8 engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit combines MAS aftermarket ignition coils (DG511, straight boots) with Motorcraft platinum spark plugs (SP515\/SP546 compatible) to replace worn ignition components on select Ford Expedition, F-150, F-250\/F-350 Super Duty, Lincoln Navigator and Mark LT vehicles equipped with the 5.4L V8. The package is sized for a full-bank replacement—eight coils and eight plugs—so you replace all cylinders at once for balanced performance and easier troubleshooting. Included compatibility references and multiple OEM cross-numbers make it straightforward to confirm fit before purchase.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I confirm these coils and plugs fit my vehicle?\u003c\/h3\u003e\n\n\u003cp\u003eCheck the shape of your existing coil boots and your vehicle's model-year range. This MAS kit is designed for straight-boot coils (DG511); if your coils have curved or brown boots, this kit is not the correct match. Cross-referencing OEM part numbers or comparing cylinder-count and engine size will avoid misorders.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 5.4L V8 Ford\/Lincoln models from the mid-2000s (see make\/model list below).\u003c\/li\u003e\n  \u003cli\u003eDG511 = straight-boot coil option; DG508 = curved boot; DG521 for brown boots.\u003c\/li\u003e\n  \u003cli\u003eCompare part numbers: 3L3E-12A366-CA, C1541, UF537, FD508 and others listed.\u003c\/li\u003e\n  \u003cli\u003eFull-kit contains 8 coils + 8 Motorcraft-compatible platinum plugs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance and reliability benefits should I expect after installation?\u003c\/h3\u003e\n\n\u003cp\u003eReplacing all ignition coils and spark plugs together helps restore even ignition timing and consistent combustion across cylinders, which can improve throttle response and smooth idle. While results vary with vehicle condition, fresh coils and plugs usually reduce misfires and can improve drivability compared with worn components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMore uniform spark delivery across all eight cylinders.\u003c\/li\u003e\n  \u003cli\u003eReduced chance of cylinder misfire and related error codes.\u003c\/li\u003e\n  \u003cli\u003ePotential smoother idle and crisper throttle response.\u003c\/li\u003e\n  \u003cli\u003eConvenience of a full-bank replacement for easier diagnostics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install the MAS DG511 coils and Motorcraft plugs?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation is a standard service for mechanically inclined DIYers or a routine job for any professional mechanic. Always follow torque specs for spark plugs and secure electrical connectors for coils to avoid damage. Replace one cylinder at a time if working solo to prevent mix-ups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDisconnect the battery before starting work for safety.\u003c\/li\u003e\n  \u003cli\u003eRemove ignition coil mounting bolts, unplug harness, and pull coil straight up.\u003c\/li\u003e\n  \u003cli\u003eInstall new spark plug with proper gap (use manufacturer spec) and torque to spec.\u003c\/li\u003e\n  \u003cli\u003eSeat new coil onto plug, reconnect harness, and tighten mounting bolts to spec.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat warranty and support come with this kit?\u003c\/h3\u003e\n\n\u003cp\u003eMAS includes a limited one-year warranty with the ignition kit, covering defects in materials and workmanship under normal use. Keep your purchase documentation and note vehicle fitment information in case you need assistance; warranty terms vary by seller.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne-year limited warranty from MAS.\u003c\/li\u003e\n  \u003cli\u003ePackage contains 8 MAS DG511 coils and 8 Motorcraft-compatible platinum plugs.\u003c\/li\u003e\n  \u003cli\u003eCheck seller return policy for fitment returns before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This kit is aimed at owners and mechanics who need a complete ignition-bank replacement for mid-2000s Ford and Lincoln 5.4L V8s—including Expedition, F-150, F-250\/F-350 Super Duty, Navigator and Mark LT—when the vehicle uses straight-boot ignition coils. It suits anyone wanting to replace all coils and plugs at once for consistent ignition, simplified troubleshooting, and to help restore reliable engine performance. Confirm boot style and OEM cross-references before ordering to ensure correct fit.\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: Do these coils fit curved-boot setups?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. These MAS DG511 coils are straight-boot type. For curved boots choose DG508; for brown boots choose DG521.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which vehicles are compatible with this kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed for 5.4L V8 Ford\/Lincoln models from mid-2000s: select Expedition, F-150, F-250\/F-350 Super Duty, Navigator and Mark LT years.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MAS","offers":[{"title":"Default Title","offer_id":48080346546334,"sku":"B0743LRJ7L","price":264.49,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/mas-front-packaging-coils-plugs.jpg?v=1785780510","url":"https:\/\/northtrailauto.ca\/products\/mas-ignition-coil-spark-plug-kit-8-pack-straight-boot-dg511-for-5-4l-v8-platinum-plugs","provider":"North Trail Auto","version":"1.0","type":"link"}