autoexact Ignition Coil & Iridium Spark Plug Kit for Ford 4.6L/5.4L — 8-Pack Coils & Pre-Gapped Plugs, OE-Fit

Autoexact's complete ignition coil and iridium spark plug kit supplies eight OE-fit coil packs and eight fine-wire iridium plugs engineered to restore reliable spark performance for Ford 4.6L and 5.4L engines.

This all-in-one replacement kit is designed for direct fitment to many Ford, Lincoln, and Mercury models equipped with 4.6L or 5.4L V8 engines. Each kit includes pre-gapped iridium spark plugs and epoxy-potted coil packs that meet or exceed OEM build quality. The set aims to address common ignition symptoms like misfires, rough idle, hard starts, and decreased fuel efficiency while offering a DIY-friendly installation—saving you time and dealer costs.

How will this kit affect engine performance and fuel economy?

Replacing worn coils and plugs restores consistent high-voltage spark delivery, improving combustion efficiency across cylinders. That often yields smoother acceleration, reduced engine vibration, and better throttle response without other engine changes.

• Stronger, more consistent sparks from iridium plugs and epoxy-potted coils
• Improved combustion reduces unburned fuel and rough running
• Potential improvement in fuel efficiency and restored horsepower
• Targets common diagnostic codes P0300–P0308 related to misfires

Will these ignition coils and plugs fit my specific Ford model and year?

The kit is engineered as a direct OE-style replacement for a range of Ford, Lincoln, and Mercury vehicles using 4.6L or 5.4L engines. Always confirm your exact year, make, model, and engine before ordering to ensure correct fitment.

• Fits numerous Ford vehicles: F-150, Mustang, Crown Victoria, E-Series, F-250/F-350, Expedition, and others listed by year
• Compatible with Mercury Grand Marquis and Mountaineer, Lincoln Town Car and Navigator models noted
• Cross-referenced OE and replace numbers included for verification
• Designed for direct plug-and-play installation with no modification

What are the product specifics and installation details I should know?

Each kit contains eight iridium spark plugs pre-gapped and eight epoxy-sealed ignition coils. Components are pre-lubricated with dielectric grease where applicable and engineered for OEM torque specs to streamline DIY replacement.

• Includes 8 ignition coil packs + 8 iridium spark plugs, pre-gapped (1.3 mm preset gap)
• Plugs are fine-wire iridium rated for long life (typical service up to ~40,000 miles under normal driving)
• Coils are epoxy-potted for heat resistance and tested for voltage output and sealing
• Recommended fastening torque: 11.06 ft·lb (15 N·m); kit arrives with green dielectric grease applied

How reliable is the kit and what warranty or support is offered?

Autoexact subjects each coil to quality and electrical testing to verify output and insulation. The kit is backed by a two-year warranty and lifetime technical support, giving you recourse if issues arise after installation.

• Voltage, insulation, and sealing tests performed on coils
• 2-year warranty coverage plus lifetime technical support
• OE and replacement part numbers supplied for cross-referencing
• Important fitment note included: heat range compatibility clarified (range 5 or 6 interchangeable)

Who is this for: This Autoexact kit is intended for vehicle owners, fleet managers, and DIY mechanics who have Ford, Lincoln, or Mercury vehicles with 4.6L or 5.4L engines and want a comprehensive ignition refresh. It's ideal if you experience misfires, rough idle, reduced fuel economy, or illuminated check-engine codes, and prefer a direct-replacement, plug-and-play solution to avoid dealer labor.