Aeagle Ignition Coil and Iridium Spark Plug Kit — 8‑Set for Ford/Lincoln 5.4L & 4.6L (2008–2014), Heat‑Resistant Coils

Aeagle’s complete ignition coil and iridium spark plug kit replaces worn coils and plugs on compatible Ford and Lincoln 4.6L/5.4L V8 engines to restore reliable starting and smoother running.

If your F‑Series, Expedition, Navigator, Explorer, Mustang or Super Duty shows rough idle, reduced throttle response, or poor fuel economy, worn ignition coils and plugs are often the cause. This kit bundles eight matching ignition coils and iridium spark plugs engineered to fit many 2008–2014 Ford and Lincoln 4.6L and 5.4L V8 models. Components are built with heat-resistant housings and high-conductivity copper windings, while the iridium plugs use durable electrodes for longer life and consistent spark performance.

Which vehicles and engines is this kit compatible with?

This set is designed for multiple Ford, Lincoln and Mercury V8 models commonly equipped with 4.6L or 5.4L engines from the 2008–2014 model years. Always double-check your engine displacement, part lengths and original part numbers before ordering.

• Ford F‑150 2008–2010 (5.4L and some 4.6L fitments)
• Ford Expedition 2008–2014 (5.4L V8)
• Ford Explorer/Explorer Sport Trac 2008–2010 (4.6L V8)
• Ford Mustang 2008–2010 (4.6L V8), F‑250/F‑350 Super Duty 2008–2010 (5.4L)
• Lincoln Navigator 2008–2014 (5.4L V8) and Mercury Mountaineer 2008–2010 (4.6L)

How do these ignition coils differ from stock units?

Aeagle coils use epoxy resin and PPT plastic exteriors to resist heat deformation, while internal copper windings increase conductivity for a faster, stronger spark. That combination helps maintain consistent ignition under heavy use and high engine temperatures.

• Heat‑resistant housing reduces risk of melt or crack under high temperatures
• Copper coil cores for improved electrical transfer and quicker ignition
• Direct-replacement fit for specified OEM part numbers (see compatibility list)

Why choose iridium spark plugs in this kit?

Iridium electrodes are harder and more oxidation‑resistant than conventional plugs, which helps them hold a precise spark gap and last longer. The result is steadier combustion, fewer misfires, and extended service intervals compared with standard plugs.

• Fine iridium tip improves ignition reliability and efficiency
• Greater electrode wear resistance for longer service life
• Better thermal and electrical conductivity than standard plugs

What part numbers and fitment notes should I verify before ordering?

This kit is intended to replace many common OEM numbers, but some visual differences matter. Confirm your original coil’s boot color and shape—the kit fits coils with brown boots and does not fit black‑boot or curved‑boot variants.

• Replaces ignition coil references such as DG521, FD509, C1659, 5C1716 and related numbers
• Compatible spark plug reference SP509 (not compatible with SP515)
• Verify part length, connector style and boot color before installation

Who this is for: This kit is aimed at DIY mechanics, fleet maintenance shops and owners of compatible Ford, Lincoln or Mercury V8 vehicles who need a full bank replacement of coils and plugs. If you want a direct‑fit, heat‑tolerant coil and longer‑life iridium plugs to address misfires, rough idle or reduced performance, this eight‑set kit provides all components needed to refresh one engine’s ignition system. Note: Aeagle offers a one‑year warranty; always confirm exact model, engine size and OEM reference numbers before purchase.