Marsram Ignition Coil and Iridium Spark Plug Kit for 5.4L V8 Ford F-150 (2005–2007) — 8 FD508 Coils + 8 Plugs, Straight Black Boot

Marsram’s kit delivers eight FD508 ignition coils plus eight iridium spark plugs engineered to restore consistent spark and smooth operation for 5.4L V8 engines in compatible 2005–2007 Ford F-150 and select Ford/Lincoln trucks.

This complete ignition module and plug set replaces worn or failed components with parts built from high-strength plastics, epoxy resin, and copper windings for the coils, plus long-life iridium tips on the spark plugs. The package is intended specifically for V8 engines using straight black boots — it is not compatible with V10 engines or coils with brown or curved boots. Fitment covers a broad list of Ford and Lincoln vehicles from mid-2000s model years; confirm your original coil appearance and OE part numbers before installing.

Will these coils and plugs fit my 2005–2007 Ford F-150 5.4L?

They are designed to fit F-150 models equipped with the 5.4L V8 that use straight black-boot ignition coils. The listing replaces several OE and aftermarket part numbers, so cross-reference your vehicle’s existing coils before ordering.

• Compatible with many 2004–2008 Ford F-series 5.4L V8 applications listed in the product details.
• Not compatible with V10 engines or coils that have brown or curved boots.
• Replaces common part numbers such as FD508, DG511, 3L3Z-12029-BA, UF537, and others.

How do Marsram ignition coils differ from original equipment?

These aftermarket coils use epoxy resin and reinforced engineering plastics to resist heat and deformation, while internal windings are made from high-conductivity copper to support quicker, more consistent spark delivery. The design aims to match OEM electrical performance while offering robust thermal resistance.

• Durable outer housing resists melting and engine-bay heat.
• Copper coil windings for reliable electrical conductivity and ignition speed.
• Manufactured to replace a range of OE part numbers for direct-fit replacements.

What performance and durability can I expect from the included spark plugs?

Marsram includes iridium-tipped spark plugs that provide a stable, long-lasting electrode surface to minimize gap erosion and maintain consistent combustion over many miles. Iridium electrodes reduce spark degradation and help preserve throttle response and start-up reliability compared to conventional plugs.

• Iridium center electrode for long service life and stable spark gap.
• Corrosion-resistant electrodes to reduce gap growth and maintain efficiency.
• Designed to support complete combustion for quicker starts and steady acceleration.

What comes in the kit and what warranty support is offered?

The Marsram package contains eight ignition coils and eight iridium spark plugs — enough to service all cylinders on V8 engines that accept FD508-style coils. The product is backed by a one-year warranty and customer support to address fitment questions or product concerns.

• Package: 8x FD508-compatible ignition coils and 8x iridium spark plugs.
• One-year limited warranty with customer service available for issues.
• Installation note: verify coil boot style and part numbers before fitting.

Who is this for: This kit is best for DIY mechanics, fleet technicians, and owners of mid-2000s Ford and Lincoln vehicles with the 5.4L V8 who need a full-bank ignition service. Choose this set if your truck uses straight black-boot FD508-style coils and you want a single, ready-to-install package of coils and long-life iridium plugs to restore ignition reliability and responsiveness. If you’re unsure about fitment, compare the coil shape and OE number on your vehicle to the listed references or contact Marsram support for help.