Ignition Coil + Iridium Spark Plugs for Ford F-250 (2008-2010) 5.4L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2008-2010 Ford F-250

What it Does: The Direct-Fit Ignition Coil and Iridium Spark Plug Kit replaces degraded factory secondary ignition components on the 2008-2010 Ford F-250 to eliminate under-load misfires and restore combustion efficiency.

The Stock Ford F-250 Secondary Ignition Breakdown

The 5.4L Triton 3V Modular V8 engine within the P356 platform exposes ignition coils to intense cylinder head thermal cycling. Over continuous towing cycles, the OEM epoxy breakdown in factory units like 8L3Z12029A induces internal dielectric failure, causing secondary voltage leakage. Concurrently, standard spark plug electrodes erode, expanding gap tolerances. This elevated resistance strains the secondary ignition windings, causing hesitation, rough idle, poor fuel economy, and persistent P0300 through P0308 trouble codes under load.

The Engineering Solution

Engineered for high-duty cycles, these coil-on-plug (COP) units feature vacuum-poured dielectric epoxy and high-conductivity copper windings designed to resist thermal degradation. Reinforced silicone boots prevent high-voltage arcing to the plug wells. Paired with fine-wire iridium spark plugs, the laser-welded electrode design minimizes spark quenching and maintains precise gap tolerances under severe combustion temperatures. The resulting high-energy arc guarantees rapid flame kernel propagation, complete fuel burn, and consistent spark stability under heavy load demands.

Technical Specifications

Compatibility

• 2008 Ford F-250 Super Duty 5.4L V8 (XL, XLT, Lariat, FX4, King Ranch)
• 2009 Ford F-250 Super Duty 5.4L V8 (XL, XLT, Lariat, FX4, King Ranch, Cabela's)
• 2010 Ford F-250 Super Duty 5.4L V8 (XL, XLT, Lariat, King Ranch, Cabela's)

Frequently Asked Questions

Does this fit the P356 F-250?
Yes, this is a direct fit for the 2008-2010 Ford F-250 equipped with the 5.4L Triton 3V engine.

Are these coils designed for the revised brown-boot cylinder head design?
Yes, this kit matches the late-style spark plug and coil design introduced mid-model year 2008 featuring standard 12mm spark plug threads.

The Ford Heavy-Duty Durability Standard

Heavy towing and sustained payload hauling place immense strain on your Super Duty's ignition performance. Refreshing with high-dielectric coils and erosion-resistant iridium plugs ensures consistent cylinder pressure delivery and reliable towing output under extreme commercial work cycles.