MAS Ignition Coil and Spark Plug Kit — Set of 10 Yellow Curved-Boot Coils with SP479 Motorcraft-Compatible Plugs for 5.4L Ford/Lin

MAS Yellow Set of 10 ignition coils with Motorcraft-compatible SP479 spark plugs is a direct-fit replacement package designed to restore reliable spark to 5.4L Ford and Lincoln engines while adding a distinctive yellow finish to the engine bay.

This kit bundles ten MAS ignition coil packs with curved boots plus Motorcraft-compatible SP479 spark plugs to replace worn ignition components on many Ford F-150, F-250, F-350, Expedition, Econoline and select Lincoln models from the late 1990s through mid-2000s. Each coil meets or exceeds original equipment standards and the set ships with a one-year limited warranty. Before ordering, verify vehicle compatibility with the fitment list to avoid mismatches with visually similar parts.

What vehicles and engines does this MAS coil and spark plug set fit?

These coils and plugs are intended for Ford/Lincoln vehicles equipped with the 5.4L V8 from the late 1990s into the 2000s, including E-Series vans, Expedition, F-150 (5.4L) and many Super Duty models. The listing replaces several factory part numbers, increasing the chance of a correct match for older vehicles.

• Common fits: 1998–2008 E-150/E-250/E-350/E-450 and Econoline Super Duty
• Included models: 1998–2004 Expedition, 1998–2003 F-150 (5.4L) and 1999–2004 F-250/F-350/F-450/F-550
• Also covers: 2000–2005 Excursion and select Lincoln Navigator applications
• Replaces factory references such as FD503, DG508, SP479 and related numbers

How do the yellow coil packs affect performance and appearance?

The yellow finish is primarily aesthetic, giving the engine bay a distinct, customized look. Functionally, the coils are engineered to meet OE electrical specifications, restoring ignition reliability and consistent spark delivery for better idle stability and drivability compared with failed or aging coils.

• Visual upgrade: bright yellow housing improves engine-bay presentation
• Electrical design: built to OE-equivalent standards for proper spark timing
• Fuel and drivability: can reduce misfires caused by weak coils when installed correctly
• Durability: tested under quality control to match original equipment behavior

What should I check before buying this replacement kit?

Confirm engine size and production years for your vehicle and compare the listed replacement part numbers with your existing coils and plugs. Fitment errors are common when multiple engine variants share similar appearance parts, so cross-referencing prevents returns and incorrect installation.

• Verify your engine is the 5.4L V8 before ordering
• Compare OEM part numbers (e.g., DG508, FD503, SP479) to your current parts
• Inspect connector and boot shape to ensure plug-and-play replacement
• Use the seller’s fitment list or VIN lookup if available

What warranty and support come with the MAS coil and spark plug set?

The product is covered by a one-year limited warranty that addresses manufacturing defects under normal use. For fitment help or warranty claims, keep purchase documentation and photos of part numbers and connectors to speed support from the seller.

• One-year limited warranty included
• Save receipts and photos for any warranty processing
• Contact seller for troubleshooting and part verification
• Return policies depend on the retailer; check terms before buying

Who is this for: This replacement set is aimed at owners and mechanics maintaining late-1990s to mid-2000s Ford and Lincoln trucks, vans and SUVs with the 5.4L V8 who want a full coil-and-plug refresh in one purchase. It’s useful for fleet technicians, DIY enthusiasts replacing multiple failed coils, and anyone seeking a uniform appearance upgrade under the hood while restoring reliable ignition performance.