DG508 Ignition Coil Packs & SP479 NGK Spark Plugs Replacement - Direct

In this review the DG508 ignition coil packs and SP479 NGK spark plugs are evaluated as a budget-friendly, direct replacement for Ford 4.6 and 5.4 V8 models. The bottom line: this kit is for DIY owners who want a straightforward swap to restore spark delivery without paying dealer prices. The main reason to buy is the clear focus on fitment and compatibility with many factory part numbers, which makes it a practical choice when coils have failed and a fast, user-installable fix is required.

Key Features

• Direct replacement: Designed to match factory mounting and electrical connections so installation is straightforward for owners who are comfortable with basic engine work.
• Wide compatibility: Covers several OEM part numbers such as DG508, DG457, DG472 and equivalents so it fits a range of Ford 4.6 and 5.4 V8 applications.
• Includes spark plugs: The SP479 NGK plugs included allow a paired coil and plug refresh that can improve ignition consistency when both components are aged.
• Saves time and money: Buying this replacement set and installing it yourself reduces shop labor and downtime compared with dealer service.
• Warranty support: The seller promises a 5 year period with proof of purchase and a no-hassle refund or replacement policy if issues arise.

Who It's For

This kit is best for Ford F-150, Mustang, Crown Victoria, Lincoln Town Car, Mercury and Excursion owners who have identified misfires or coil failures and prefer to perform the service themselves. It suits DIY mechanics who need a like-for-like replacement that matches known OEM numbers and want the convenience of coils and plugs together.

It is not ideal for buyers who demand OE branding or who require long-term fleet duty-cycle testing; some customers reported mixed long-term functionality, so professional fleets or those seeking extended longevity beyond warranty may prefer OEM dealer parts or higher-end aftermarket brands.

Pros & Cons

Pros

• Good fit and straightforward installation for vehicles listed in the fitment guide.
• Includes both coils and NGK plugs, offering a complete ignition refresh in one purchase.
• Value for money compared with dealer replacement and includes a 5 year proof-based warranty.
• Many customers report improved engine responsiveness and better fuel economy after replacement.

Cons

• Functionality feedback is mixed; a minority of users reported coils failing weeks after installation, so longevity may vary.

Specifications

Product type	Ignition coil packs and spark plugs replacement kit
Compatible engines	Ford 4.6L and 5.4L V8
Included parts	Ignition coils and SP479 NGK spark plugs
Compatible part numbers	DG508, DG457, DG472, DG491, SP479, F523, 3W7Z12029AA
Warranty	5 years with proof of purchase
Intended vehicles	F-150, Mustang, Crown Victoria, Town Car, Excursion, Mercury models

Our Verdict

The DG508 coil and SP479 plug kit is a practical value option for owners who need a rapid, compatible replacement and are comfortable doing the swap themselves. It offers clear benefits in fit and initial performance and the included warranty mitigates some risk, but buyers seeking proven long-term durability for heavy-duty use should weigh OEM options as well.

Frequently Asked Questions

Will these coils fit my Ford 5.4 V8?
They are designed for Ford 4.6 and 5.4 V8 applications; confirm fitment with the product fitment filter and vehicle details before purchase.

Are spark plugs included?
Yes, the kit includes SP479 NGK spark plugs so you can replace coils and plugs together.

What warranty is offered?
The seller provides a 5 year warranty with proof of purchase and a no-hassle refund or replacement promise if you are not satisfied.