MAS ignition kit for Ford 5.4L V8 — 8 straight-boot DG511 coil packs + 8 SP546 platinum spark plugs (2004–2008)

MAS complete ignition kit pairs eight platinum spark plugs with eight straight-boot ignition coil packs engineered to restore reliable ignition for Ford 5.4L V8 engines.

If your F-150, Expedition, Super Duty, Navigator, or Mark LT with a 5.4L V8 is showing rough starts, reduced throttle response, or misfires, fresh coils and properly gapped platinum plugs are often the most direct repair. This MAS kit bundles the straight-boot DG511 coil packs with Motorcraft-style SP546 platinum plugs so you can replace the most common wear items on one service visit. The package is intended as a direct-fit replacement for many factory part numbers on 2004–2008 model years but requires a quick boot-shape check before ordering.

How do I confirm these parts fit my truck?

Fitment depends on model year and the shape/color of your ignition boots. MAS DG511 coils are for straight boots; if your original boots are curved or brown, a different coil code is needed. Always cross-check your vehicle year, engine (5.4L V8), and original coil appearance before purchasing.

• Compatible with Ford Expedition, F-150, F-250, F-350, Lincoln Mark LT, and Navigator 2004–2008 5.4L engines.
• DG511 = straight boots; DG508 = curved boots; DG521 = brown boots replacement.
• Use Amazon's "Your Garage" or compare part numbers like FD508, SP546, DG511 to confirm match.

What does the kit include and why replace both components together?

This kit contains eight MAS straight-boot ignition coil packs (DG511) plus eight platinum spark plugs (SP546). Replacing coils and plugs at the same time ensures consistent spark energy, reduces the chance of early failures, and simplifies troubleshooting after installation.

• 8 MAS straight-boot coil packs (DG511) for consistent secondary ignition output.
• 8 platinum spark plugs (SP546) chosen for longevity and stable gap retention.
• Complete replacement avoids mixing new coils with aged plugs and improves restart reliability.

How will these parts affect engine operation and maintenance?

While they don't change engine tuning, new coils and platinum plugs restore proper combustion consistency and can reduce misfires, rough idle, and inconsistent acceleration caused by worn ignition components. They also simplify future diagnostics because ignition-related faults are less likely after a full ignition-service refresh.

• Restores uniform spark delivery across all cylinders for smoother idling.
• Helps maintain fuel combustion stability and throttle response under load.
• Platinum plugs offer extended service life compared with standard copper plugs.

What should I know about installation and warranty?

Installation is a direct-replacement process for matching vehicles; basic tools and service manuals make the swap straightforward. MAS backs this kit with a one-year limited warranty against manufacturing defects—keep purchase documentation and confirm compatibility first.

• Direct-fit parts replace factory coils and plugs without major modifications on compatible models.
• Follow torque specs and gap checks recommended for the 5.4L V8 during installation.
• One-year limited warranty included; use "Your Garage" tool to double-check fitment before ordering.

Who is this for: This MAS ignition kit is aimed at owners and technicians servicing Ford and Lincoln trucks and SUVs with the 5.4L V8 who want a complete, single-purchase solution for ignition-related issues. It is particularly useful for vehicles from the 2004–2008 model years that require straight-boot coil packs (DG511) and benefit from the durability of platinum spark plugs.