CarBole Ignition Coil Pack (DG508) 8-Piece Curved-Boot Kit, Direct-Replace for Ford 4.6L/5.4L/6.8L V8/V10

If your V8 or V10 is showing hesitation, rough idle, or poor performance due to worn ignition coils, the CarBole DG508 set provides direct-replacement curved-boot coils built for durability and consistent electrical resistance. These coils are engineered as upgraded aftermarket replacements compatible with many Ford E150/E250/E550 and F-series trucks and their Lincoln/Mercury counterparts. They come in a full eight-piece kit so you can replace all coils at once for even firing and simplified maintenance.

Will these coils fit my Ford or Lincoln engine?

The DG508 curved coils are compatible with numerous factory part numbers and applications for Ford V8/V10 engines, but they do not suit every model year or layout. They are intended for earlier 4.6L, 5.4L, and 6.8L engines that use curved boot coils; they specifically do not fit 2004-and-newer F-150s equipped with the 5.4L V8 that use straight boots.

• Fits: Ford E150, E250, E550, F150 (certain years), F250, F550; Lincoln and Mercury models with matching engines.
• Engine sizes: 4.6L, 5.4L, 6.8L V8 and V10 applications where curved boots are required.
• Not compatible with 2004+ F-150 5.4L V8 that requires straight-boot coils.
• Cross-references common OEM numbers such as F523, 1L2U12029AA, 3W7E12A366AA, 88921369, DG491, FD-503, and others included on the product listing.

How do these coils improve engine performance and reliability?

CarBole coils are built from high-grade materials that maintain stable electrical resistance and deliver strong, consistent spark to the spark plugs. That stable performance reduces ignition misfires and hesitation that often arise from cracked or degraded coils, especially under heavy load or extreme conditions.

• High-grade insulation and corrosion-resistant components for longer service life.
• Designed to produce strong spark energy for cleaner combustion and smoother running.
• Curved boot design ensures correct fit and secure connection for compatible engines.
• Sold as an eight-piece kit to replace all coils and restore balanced firing.

What should I expect during installation and routine use?

Installation is straightforward for anyone comfortable with basic engine work: unplug the electrical connector, unbolt the coil, and swap in the new curved-boot CarBole unit. Once installed, you should notice improved starting consistency and fewer transient misfires, particularly if original coils were failing.

• Simple bolt-and-plug replacement — common hand tools required.
• Replace all eight coils at once for the best results and even wear.
• Inspect spark plug condition and wiring during the swap for optimal outcomes.
• Keep connectors clean and torque bolts to manufacturer specs to prevent issues.

Who is this for: The CarBole DG508 8-pack is aimed at owners and technicians of Ford, Lincoln, and Mercury vehicles with compatible 4.6L, 5.4L, or 6.8L V8/V10 engines who need a cost-effective, durable replacement for aging or failing ignition coils. It’s ideal when you want a full-coil refresh to eliminate intermittent misfires, improve throttle response, and restore smooth idle behavior without buying individual coils. Note: confirm your vehicle uses curved-boot coils before ordering to ensure correct fitment.