BELKEBIR Ignition Coil Pack & Iridium Spark Plugs Set for 5.4L V8 — 8-Pack DG511 Straight Black Boots, Direct OEM Fit

If your 5.4L V8-equipped vehicle is showing rough idle, misfires, or reduced throttle response, this matched coil-and-plug kit replaces aging ignition components with parts engineered to meet factory fit and function. The bundle targets Ford and Lincoln models from the mid‑2000s that use straight black boot DG511-style coils and specified iridium plugs. Designed for straightforward installation, the set aims to restore consistent spark energy and longer plug life compared with standard copper units.

How will these ignition coils and spark plugs improve engine performance?

Replacing worn coils and plugs helps restore reliable combustion by providing stronger, more consistent sparks across all cylinders. The DG511-style coil packs are built to match original electrical characteristics, while iridium plugs offer a finer electrode for efficient flame propagation and durability.

• Higher spark energy reduces misfires and hesitation during acceleration.
• Iridium electrodes resist wear for longer service intervals and stable ignition gaps.
• Direct-fit coil packs maintain OEM connector and mounting locations for proper alignment.

Which vehicles and part numbers is this kit compatible with?

This kit is compatible with Ford and Lincoln trucks and SUVs using the 5.4L V8 engine from the specified year ranges, provided the vehicle uses straight black coil boots. It replaces many common OE numbers and aftermarket references for a simple cross‑match.

• Fit examples: 2005–2008 Ford Expedition, 2004–2008 Ford F‑150, 2005–2008 F‑250/F‑350 Super Duty, 2006–2008 Lincoln Mark LT, 2005–2008 Lincoln Navigator (5.4L V8).
• Coil cross-references: DG511, FD508, UF537, 5C1584, E508 and related OE codes.
• Spark plug cross-references: SP515, SP546, SP546X matched to iridium tip specifications.

How easy is installation and what should I prepare?

The kit is a plug‑and‑play replacement designed to follow OEM mounting and electrical connections, keeping installation simple for a DIYer or technician. Basic hand tools and adherence to torque and gap specs for the plugs will ensure correct assembly and reliable long‑term operation.

• Replace coils and plugs one cylinder at a time to keep wiring organized.
• Use a torque wrench on spark plugs and confirm coil electrical connectors seat fully.
• Inspect coil boots and harness clips for damage before final assembly.

What are the construction highlights and expected benefits?

The coils are engineered to deliver steady high-voltage output while the iridium spark plugs use a fine, wear-resistant center electrode for consistent ignition. Together they offer improved starting, smoother idle, and more stable throttle response compared with worn components.

• Coils match OEM electrical specs for correct timing and output behavior.
• Iridium plugs extend service life and maintain gap integrity under stress.
• The set is supplied as eight coils plus eight spark plugs for a full-bank refresh.

Who is this for: Vehicle owners and mechanics who own mid‑2000s Ford or Lincoln trucks and SUVs with the 5.4L V8 and straight black coil boots, and who want a complete ignition-bank replacement to address misfires, degraded fuel economy, or rough running. This kit suits people seeking direct‑fit parts with OEM-style references, longer-lasting iridium plugs, and a straightforward install to get the engine back to smooth operation.