New Motorcraft SP548 Spark Plug Set of 8 for Mustang & F-150 - OEM

In this review the New Motorcraft SP548 spark plug set of 8 is evaluated as a direct, OEM replacement for Ford 5.0L and 5.2L V8 engines. The bottom line: these are genuine factory-spec plugs intended for owners who want reliable, trouble-free ignition and exact fitment without aftermarket guesswork. Customers report easy installation, correct pre-gap settings, and smoother idling after swap, so the biggest reason to buy is to restore factory performance and durability with a part that matches original equipment standards.

Key Features

• Genuine OEM parts: Provides the quality, reliability and durability expected from factory replacement components for long-term service.
• Direct fitment: Designed to match specified Ford 5.0L and 5.2L engine applications so you get a precise fit and correct thread engagement.
• Pre-gapped to spec: Plugs arrive with accurate gap settings that save time and reduce installation errors for a consistent idle and combustion.
• Wide application range: Compatible with multiple Mustang and F-150 trim levels and years when specified, simplifying part selection for those model lines.
• Value for money: Sold as a set of eight, offering a straightforward way to replace all cylinders at once and maintain balanced engine performance.

Who It's For

This spark plug set is best for owners of Ford Mustang and F-150 models with the listed 5.0L and 5.2L engines who prefer OEM replacements to maintain factory tuning and longevity. Drivers who value correct gap accuracy out of the box and a plug that matches original specifications will appreciate the convenience and peace of mind.

It is less appropriate for anyone running heavily modified engines with nonstandard ignition requirements or for those who need specialty spark plugs for forced-induction variants not covered by the listed applications. Always verify fitment in the owners manual before purchase to ensure compatibility with engine, drivetrain and trim level.

Pros & Cons

Pros

• Genuine OEM construction provides dependable long-term durability and consistent performance.
• Pre-gapped accuracy reduces installation time and helps maintain smooth idling and combustion.
• Good value as a set of eight, allowing full engine replenishment in one service.
• Confirmed fit and ease of installation by customers reporting factory-like performance after replacement.

Cons

• Limited to the specified Ford 5.0L and 5.2L applications, so fitment must be verified before buying.

Specifications

Brand	Ford OEM / Motorcraft
Part type	Spark plug set of 8
Compatible engines	5.0L V8 and 5.2L V8 (specified years and trims)
Intended models	Mustang (including Shelby GT350/GT350R), F-150 (multiple trims)
Years covered	2011-2020 range depending on engine and trim
Fitment note	Verify fitment in owners manual before purchase

Our Verdict

The New Motorcraft SP548 set is a sensible choice for Ford owners seeking an exact OEM spark plug replacement. It delivers correct gap accuracy, straightforward installation and the durability expected from factory parts, making it good value for anyone maintaining a Mustang or F-150 with the listed 5.0L or 5.2L engines. Verify fitment first, then buy this set to regain factory-like ignition performance.

Frequently Asked Questions

Will these plugs fit my Mustang GT?
They fit Mustang GT models equipped with the specified 5.0L or 5.2L engines listed in the application notes; check your owners manual for confirmation.

Are the plugs pre-gapped?
Yes, customers report the plugs come pre-gapped to OEM specifications, saving time during installation.

Can I use these on a modified engine?
They are intended as OEM replacements; owners of heavily modified or forced-induction engines should confirm compatibility or choose specialty plugs suited to altered ignition needs.