Marsram Ignition Coil Pack DG508 for Ford F-150 4.6L/5.4L — Direct-Fit Black Curved-Boot, Heat-Resistant

Marsram DG508 ignition coil pack is a direct-fit replacement designed for Ford, Lincoln and Mercury V8 engines that use the black curved-boot style, restoring reliable spark and drivability.

This Marsram ignition coil pack fits a wide range of Ford, Lincoln and Mercury vehicles equipped with 4.6L, 5.4L and selected 6.8L engines when the original coils have the black curved boot. Engineered with an epoxy-resin outer shell and high-conductivity copper windings, the DG508 is built to resist heat and deliver consistent high-voltage pulses to each spark plug. Before ordering, confirm your existing coil has the black curved boot style—this unit is not compatible with straight or brown-boot variants.

How will this coil pack affect my truck’s performance?

Replacing a failing coil pack with a new Marsram DG508 can restore misfiring cylinders, smooth idle, and efficient combustion under load. It supplies stable high-voltage output so ignition timing and engine response remain consistent across driving conditions.

• Reduces misfire-related rough idle and hesitation.
• Helps maintain fuel efficiency by improving combustion.
• Supports consistent high-voltage delivery for reliable starts.

Which vehicles and engines are compatible with DG508?

The DG508 is compatible with many Ford-based platforms that use the black curved boot coil style. It covers numerous model years for F-150, Crown Victoria, E-Series vans, Excursion, Econoline, and select Lincoln and Mercury models—refer to part fitment and visually confirm boot shape.

• Covers 1998–2003 F-150 5.4L and 1998–2010 F-150 4.6L variants where applicable.
• Fits 1998–2011 Crown Victoria and Town Car 4.6L, and selected E-Series 4.6L/5.4L trucks and vans.
• Works with specified 6.8L V10 and 5.4L Super Duty applications listed in the fitment notes.

How do I verify fitment before buying a DG508 coil pack?

Physical verification is the safest method: compare your current coil’s boot shape and connector location to the DG508 specification. If you’re unsure, consult the parts finder, send a photo to the seller, or cross-reference the replacement numbers listed for compatibility.

• Check that your original coil has a black curved boot—not brown or straight boots.
• Compare OEM part numbers and the replacement list included with the DG508.
• Use photos or the online parts finder to confirm correct fitment for your model year.

What materials and warranty support are offered with this Marsram coil?

The DG508 uses a heat-resistant epoxy resin exterior and high-strength engineering plastic to protect internal components, with copper windings for efficient conductivity. Marsram backs the part with a one-year warranty after thorough testing to reduce early-life failures.

• Epoxy resin housing resists engine-bay heat and contamination.
• Copper internal coils for consistent electrical performance.
• One-year limited warranty and quality testing included.

Who is this for: The Marsram DG508 ignition coil pack is intended for DIY mechanics, professional technicians, and fleet owners who need a dependable replacement for Ford, Lincoln or Mercury V8 engines that use the black curved boot coil style. It’s ideal when you’ve diagnosed misfires, rough idling, loss of power, or failed coil codes, and you’ve confirmed visual fitment and part compatibility.