MAS Ignition Coils & Spark Plugs Kit — Set of 8 DG511 Coils & Motorcraft SP546 Plugs, Fits Ford 5.4L V8 (2004–2008)

MAS Set of 8 ignition coils DG511 with 8 Motorcraft spark plugs SP546/SP515 is a complete replacement kit designed for Ford 5.4L V8 engines and compatible Lincoln models from mid-2000s.

This replacement kit bundles eight MAS ignition coils (DG511/FD508-compatible) and eight Motorcraft spark plugs (PZH14F/SP546/SP515 variants) so you can swap every cylinder component at once. It targets 2004–2008 Ford F-150 and F-Series Super Duty trucks, 2005–2008 Expeditions, and Lincoln Navigator/Mark LT models with the 5.4L V8. The pack helps restore even firing and simplifies maintenance by using matched components selected to work together on the specified engines.

How do these coils and plugs fit my Ford or Lincoln 5.4L V8?

The kit lists compatible model years and common OEM cross-reference numbers to help verify fitment. Use your vehicle year/make/model selector and compare original part numbers—especially if your engine uses different boot colors or coil variants. If your existing coils have brown boots, DG521 is the correct alternative instead of DG511.

• Compatible with 2004–2008 Ford F-150 5.4L V8 and 2005–2008 F-250/F-350 Super Duty 5.4L V8
• Fits 2005–2008 Ford Expedition and Lincoln Navigator, 2006–2008 Lincoln Mark LT 5.4L V8
• Cross-references: 3L3U12A366BB, 3L3Z12029BA, DG511, FD508, PZH14F, HT15, PZT14F, SP515, SP546

What performance or reliability benefits can I expect after installing the full set?

Replacing all eight coils and plugs together reduces misfires, rough idle, and inconsistent throttle response caused by degraded ignition parts. Using a matched set promotes uniform spark delivery across cylinders, which helps the engine run smoother and can improve starting consistency. It’s also easier diagnostically—if problems persist, they’re less likely due to mixed-age ignition components.

• Restores consistent spark timing across all cylinders
• Reduces misfire-related rough idling and hesitation
• Simplifies troubleshooting by eliminating mixed-condition parts

What should I check before ordering to avoid incorrect parts?

Confirm the part fitment with the year/make/model dropdown and compare the original coil boot color and part numbers. Some engines use visually similar variants; selecting the wrong coil boot type or a non-matching spark plug thread/heat range can result in poor fit or performance. When in doubt, match your old coil imprint and the OEM cross-reference numbers listed with the kit.

• Verify your vehicle year, make, and model in the fitment selector
• Compare existing coil numbers and boot color (brown boots require DG521)
• Confirm spark plug thread size and recommended heat range against OEM specs

What’s included and what warranty coverage comes with the kit?

The package contains eight MAS ignition coils (DG511/FD508 compatible) and eight Motorcraft spark plugs (SP546/SP515/PZH14F compatible), providing a full ignition set for V8 engines listed. MAS backs this kit with a one-year warranty against defects; keep records of purchase and fitment confirmation to streamline any warranty claim. Installation hardware or gaskets are not included, so have basic tools and replacement seals ready if necessary.

• Includes: 8 MAS ignition coils + 8 Motorcraft spark plugs
• Common compatible part numbers provided for cross-checking
• One-year warranty from MAS on kit components

Who is this for: This kit is intended for owners and technicians working on mid-2000s Ford F-Series, Expedition, and Lincoln 5.4L V8 vehicles who want a matched, full-bank ignition replacement. It’s suited to anyone replacing worn coils or plugs, addressing misfires, or performing preventative maintenance. Make sure to verify your vehicle’s exact coil variant and original part numbers before purchase to ensure correct fitment.