{"product_id":"belkebir-ignition-coil-packs-iridium-spark-plugs-kit-for-5-4l-v8-2004-2008-8-pack-straight-black-boots-direct-fit","title":"BELKEBIR Ignition Coil Packs \u0026 Iridium Spark Plugs Kit for 5.4L V8 (2004–2008) — 8-Pack, Straight Black Boots, Direct-Fit","description":"\u003cp\u003e\u003cstrong\u003eBELKEBIR's set of eight ignition coil packs and matching iridium spark plugs replaces OE DG511\/FD508-style coils and SP546 plugs for 5.4L V8 Ford and Lincoln engines from 2004–2008, providing a direct-fit, plug-and-play ignition service kit.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen an aging ignition system causes misfires, rough idle, or poor throttle response, replacing both the coils and plugs at once restores consistent spark timing and ensures all cylinders operate uniformly. This kit includes eight straight-black-boot coil packs designed to match factory mounting and electrical connections, plus high-grade iridium spark plugs that resist wear and support reliable starts. The components are manufactured to meet or exceed OEM dimensions and electrical requirements for seamless installation.\u003c\/p\u003e\n\n\u003ch3\u003eWill these coil packs and spark plugs fit my 5.4L V8 Ford or Lincoln?\u003c\/h3\u003e\n\u003cp\u003eYes — the kit is engineered specifically for vehicles equipped with the 5.4L V8 engine from model years 2004 through 2008. It targets common OE part numbers and the straight black coil boot style used on those applications. Always verify your engine configuration and boot style before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible models: Ford Expedition, F-150, F-250 Super Duty, F-350 Super Duty; Lincoln Navigator, Mark LT\u003c\/li\u003e\n  \u003cli\u003eFitment years: 2004–2008 (5.4L V8 engines)\u003c\/li\u003e\n  \u003cli\u003eCoil boot style: straight black coil boots required\u003c\/li\u003e\n  \u003cli\u003eCross-references: DG511, FD508, C1541, IC558 and related OE numbers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these parts improve engine performance and reliability?\u003c\/h3\u003e\n\u003cp\u003eReplacing degraded coils and worn spark plugs restores consistent high-voltage output and reliable spark delivery to each cylinder. That consistency helps reduce misfires, smooth idle, and support better throttle response under load. Iridium electrodes extend service life and maintain stable firing characteristics over many miles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-energy coils designed for steady voltage and minimal heat loss\u003c\/li\u003e\n  \u003cli\u003eIridium plugs offer superior wear resistance versus standard plugs\u003c\/li\u003e\n  \u003cli\u003eFull-bank replacement prevents cylinder-to-cylinder imbalance\u003c\/li\u003e\n  \u003cli\u003eOEM-spec electrical connectors and mounting points for secure fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs installation straightforward for a DIYer or should I use a shop?\u003c\/h3\u003e\n\u003cp\u003eInstallation is intended to be direct replacement — the coils and plugs use original-style connectors and mounting locations for a plug-and-play swap. A basic tool set and torque wrench are recommended to seat plugs to specification and secure coils correctly. If you encounter seized bolts, damaged harnesses, or corrosion, a professional shop can save time and ensure correct diagnostics.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTools typically required: ratchet, spark plug socket, extension, torque wrench\u003c\/li\u003e\n  \u003cli\u003eTorque specs: follow factory torque for spark plugs and coil bolts\u003c\/li\u003e\n  \u003cli\u003eRecommended: replace boots and seals if brittle or cracked\u003c\/li\u003e\n  \u003cli\u003eWhen to consult a mechanic: persistent misfires after replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This BELKEBIR kit suits vehicle owners and technicians working on 5.4L V8 Ford or Lincoln models from 2004–2008 who want a full-bank ignition refresh with OEM-style fit and upgraded plug longevity. It’s especially useful when one or more cylinders are misfiring, when coils show visible wear or cracking, or when plugs have exceeded recommended service intervals. Use this set to restore consistent ignition performance across all eight cylinders with components matched to the original design.\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 match OE part numbers like DG511 and FD508?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The set cross-references OE numbers including DG511, FD508 and related codes for direct replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are the spark plugs iridium and compatible with 5.4L V8 engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes iridium spark plugs made for 5.4L V8 Ford\/Lincoln engines from 2004–2008.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BELKEBIR","offers":[{"title":"Default Title","offer_id":48080595910814,"sku":"B0F8H24YGY","price":118.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/belkebir-front-packaging-set-8-coils-plugs.jpg?v=1785782760","url":"https:\/\/northtrailauto.ca\/products\/belkebir-ignition-coil-packs-iridium-spark-plugs-kit-for-5-4l-v8-2004-2008-8-pack-straight-black-boots-direct-fit","provider":"North Trail Auto","version":"1.0","type":"link"}