Ignition Coil + Spark Plugs for Ford F-250 (1999-2004) 6.8L

Direct-Fit Ignition Coil and Spark Plug Tune-Up Kit for 1999-2004 Ford F-250 (P131)

What it Does: The Ignition Coil and Spark Plug Kit replaces degraded factory coil-on-plug units and worn plugs on the 1999-2004 Ford F-250 to eliminate secondary ignition misfires, restore lost combustion pressure, and smooth out rough idle under load.

The Stock Ford F-250 Ignition Coil Breakdown

The factory 2-valve 6.8L Triton V10 engine subjects its coil-on-plug (COP) assemblies to intense thermal cycling due to deep cylinder head recesses. Over time, OEM silicone boots undergo dielectric breakdown, leading to voltage arc-through directly to the cylinder head rather than the plug gap. Additionally, internal primary and secondary copper windings degrade from engine heat soak, increasing electrical resistance. Under heavy towing or wide-open throttle, this breakdown causes noticeable spark blowout, hesitation, and cylinder misfire codes (P0300–P0310).

The Engineering Solution

This kit delivers a complete secondary ignition refresh engineered for the P131 chassis platform. The ignition coils utilize high-grade magnetic silicon steel cores and high-temperature epoxy encapsulation to maximize secondary voltage output up to 35,000 volts without dielectric puncture. High-temp silicone boots with internal stainless steel springs resist thermal hardening and prevent moisture intrusion into the plug well. Paired with genuine NGK spark plugs, this setup ensures consistent flame kernel development, stable spark duration, and complete combustion across all ten cylinders.

What's Included

• 10 Ignition Coils
• 10 NGK Spark Plugs

Technical Specifications

Compatibility

• 1999-2004 Ford F-250 Super Duty 6.8L V10 Gas Models

Frequently Asked Questions & Fitment Warnings

Does this fit the P131 F-250?

Yes, this is a direct fit for the 1999-2004 Ford F-250 equipped with the 6.8L Triton V10 engine. This kit is not compatible with 5.4L V8 models, 7.3L or 6.0L Power Stroke diesel engines, or universal applications.

Are spark plug wires included with this kit?

No, the 2-valve 6.8L Modular engine operates on an individual Coil-on-Plug (COP) design where the coil mounts directly over the spark plug, completely eliminating standard high-tension spark plug wires.

The Ford Super Duty Caliber

The P131 Super Duty relies on massive low-rpm torque to haul heavy payloads and pull fifth-wheel trailers. Refreshing the full set of coils and plugs ensures consistent peak combustion pressure across all ten cylinders, safeguarding your powertrain from unburned fuel washdown and maintaining dependable towing performance.