MAS Ignition Coil and Iridium Spark Plug Kit for Ford 4.6L/5.4L V8 — 8 Coils & Plugs, DG508/AGSF22WM Compatible

This kit groups the ignition coils and iridium spark plugs you need when servicing Ford modular V8s found in Crown Victoria, Expedition, F-Series trucks, Mustang, Lincoln and Mercury models. Supplied as a set of eight coils and plugs, the components match common dealer part numbers (including DG508 and AGSF22WM families) so you can restore consistent spark delivery across all cylinders in one service interval. The package also includes a 12-month warranty—verify vehicle fitment against the included list before ordering to avoid confusion between similar spark plug part numbers.

Which Ford vehicles and engines will these coils and plugs fit?

These ignition coils and plugs are specified for Ford 4.6L and 5.4L naturally aspirated V8 engines across many late-1990s and 2000s models. Fitment covers E-series vans, Expeditions, F-150/F-250/F-350 trucks, Excursion, Mustang, Lincoln Navigator and other applicable platforms—see the detailed compatibility list to confirm your exact year and model.

• Compatible engine sizes: 4.6L and 5.4L V8 modular engines
• Covers: E-150/E-250/E-350/E-450, Expedition, Excursion, F-150/F-250/F-350, Crown Victoria, Mustang, Lincoln Navigator, Mercury models
• Model year range: late 1990s through mid/late 2000s depending on vehicle

How do these replacements match OEM parts and numbers?

MAS coils and plugs are designed to cross-reference many dealer and aftermarket part numbers so they integrate directly into stock harnesses and spark plug wells. The coils replace multiple dealer part numbers (including DG508, DG491 and related codes), while the spark plugs correspond to AGSF22WM and a variety of OEM references for a correct seat and heat range.

• Coil cross-references include DG508, FD503, DG491 and several Ford OEM codes
• Spark plug cross-references include SP-497 and AGSF22WM family OEM numbers
• Sold as a matched set of 8 coils with compatible iridium plugs for uniform performance

What’s included in the package and what warranty covers it?

The kit ships with eight ignition coil packs and the corresponding iridium spark plugs required for eight cylinders, packaged together to simplify replacement. MAS provides a 12-month warranty covering manufacturing defects—keep purchase records and inspect fitment before installation to ensure correct application.

• Package contains: 8 ignition coils + 8 iridium spark plugs
• Warranty: 12 months against manufacturer defects
• Note: Verify vehicle fitment with the provided compatibility list before installing

How should I install these parts and avoid selection mistakes?

Installation typically follows the original coil bank order and plug replacement intervals—disconnect the battery, remove old coils and plugs one cylinder at a time to preserve timing order. Pay careful attention to plug part numbers; similar plug codes can be mistaken for one another and lead to incorrect heat range or thread fit.

• Tip: Replace one cylinder at a time to keep wiring order correct
• Use a torque wrench for spark plugs to OEM torque spec; hand-start threads first
• Confirm spark plug gap and thread fit before final installation

Who is this for: This MAS kit is intended for owners, independent mechanics and fleet technicians who need a full-cylinder ignition refresh for Ford 4.6L or 5.4L V8 engines. It’s useful when addressing multiple misfires, uneven idle or as part of scheduled maintenance where replacing all coils and plugs at once restores consistent ignition timing across the engine. Always cross-check the vehicle compatibility list and OEM references to select the correct kit for your application.