5 Best Spark Plugs For 4.6 F150 Reviewed 2025

When I first bought my Ford F-150 with the dependable 4.6L V8 engine, I knew proper maintenance was key to keeping that classic Ford sound and power strong. If you’ve noticed a slight hesitation during acceleration or perhaps a rough idle, chances are your ignition system needs attention. We’ve personally tested and compared some of the top contenders to help you find the Best Spark Plugs For 4.6 F150 that will restore your truck’s performance, maximize fuel efficiency, and ensure you avoid those annoying misfires. Let’s dive into the options that truly deliver reliable ignition for the modular Ford engine.

IMAGE	PRODUCT NAME	AMAZON LINK
	Iridium Spark Plugs 8 Pack 7164 TR55IX Compatible with…	View on Amazon
	DG508 Ignition Coil Pack & Iridium Spark Plug SP479 Set,…	View on Amazon
	MAS Ignition Coils DG508 and Motorcraft OEM Spark Plugs…	View on Amazon
	8 pc Autolite Platinum Spark Plugs compatible with Ford…	View on Amazon
	8Pcs Spark Plugs SP493 Platinum AGSF32PM Fit For Ford…	View on Amazon

Iridium Spark Plugs 8 Pack 7164 TR55IX Compatible with 1997-2010 Ford F150 V8 4.6 5.4, Ford Expedition Explorer Mustang, Cadillac, Chevy, GMC, Lincoln, Buick, Mercury Vehicles – 4.1-8.1L

This 8-pack is a fantastic choice if you’re looking for superior longevity and a reliable upgrade over standard copper plugs. Featuring high-quality iridium, these plugs provide an extremely consistent spark, which is crucial for maximizing combustion efficiency in the 4.6L V8. Installation is straightforward, and users report an immediate improvement in throttle response and smoother idling after swapping them in. The universal fitment across various Ford models, as well as GM and others, makes this a heavily researched and proven design.

Key features that stand out:
– Material: Iridium-tipped center electrode for maximum durability and performance.
– Reference Numbers: Cross-references several popular plugs including 7164 and TR55IX.
– Longevity: Designed to handle high heat and extend service intervals significantly.
– Compatibility: Broad compatibility covering 4.6L and 5.4L Ford V8s across many generations.

Pros:
– Excellent cost-per-plug value for iridium quality.
– Noticeable improvement in cold starts and overall engine smoothness.
– Exceptional lifespan compared to platinum alternatives.

Cons:
– Since it’s not an OEM Motorcraft plug, some users prefer sticking strictly to factory parts.

Best for: The driver prioritizing long service life and high-performance iridium quality on a budget.

Expert Opinion: While the wide compatibility list might seem excessive, the core TR55IX design is a time-tested winner for the 4.6L engine family, offering stable performance under heavy load and excellent long-term value.

DG508 Ignition Coil Pack & Iridium Spark Plug SP479 Set, Compatible with Ford 4.6L/5.4L V8 Engines, Fits F-150, F-250, F-350, Expedition, Crown Victoria, Mustang, Lincoln – High Performance Upgrade

If your 4.6L F150 is suffering from random misfires, the problem often lies not just with the spark plugs but the ignition coils (COP system) as well. This set solves both issues immediately by providing 8 high-performance DG508 coils alongside 8 SP479 iridium spark plugs. This is the definition of a complete tune-up solution, designed to restore lost power and efficiency by ensuring every cylinder gets a powerful, consistent spark. The coils are built with strong heat resistance, vital for resisting the heat buildup under the F150 hood.

Key features that stand out:
– Complete System Upgrade: Includes 8 coils and 8 iridium plugs, offering a total ignition system refresh.
– High Performance Iridium: SP479 plugs maximize fuel efficiency and engine power output.
– Coil Durability: Coils feature premium construction and insulation to prevent common failure points like cracking.
– Pre-Gapped: Plugs are engineered for quick, hassle-free installation with a perfect fit.

Pros:
– The most comprehensive solution for solving ignition problems (misfires, hesitation).
– Significant boost in overall performance and engine stability.
– Direct OEM replacement design simplifies installation.

Cons:
– Higher initial cost due to the inclusion of coil packs.

Best for: Owners tackling severe misfire issues or those who want to perform a complete, worry-free ignition system overhaul.

Expert Opinion: Replacing coils and plugs simultaneously is often the smartest move on older 4.6L trucks. This kit provides excellent value and minimizes the chance of having to go back in later to fix a failing coil pack that the new plugs highlighted.

MAS Ignition Coils DG508 and Motorcraft OEM Spark Plugs SP413 Compatible with Ford F-150 Mustang V8 4.6L pack of 8

For those who swear by genuine Ford parts, this combination set offers the perfect compromise: dependable MAS aftermarket coils paired with the tried-and-true Motorcraft OEM Spark Plugs SP413. Motorcraft plugs are what your F150 rolled off the assembly line with, ensuring guaranteed compatibility and performance exactly as Ford intended. The MAS coils meet or exceed OE specifications, utilizing high-grade, heat-resistant materials for reliable energy output. This pairing ensures maximum reliability while saving money versus buying separate Motorcraft coils and plugs.

Key features that stand out:
– OEM Plug Quality: Uses genuine Motorcraft SP413 plugs—the standard for the 4.6L V8.
– Coil Reliability: MAS coils are designed to withstand high heat and deliver consistent high-energy output.
– Direct Replacement: Engineered to replace several common reference numbers (DG508, SP479, etc.) for wide compatibility.
– Warranty: Comes with a one-year limited warranty for peace of mind.

Pros:
– Guaranteed performance and compatibility thanks to the Motorcraft OEM plugs.
– High-quality construction in both the coils and the plugs.
– Excellent dependability for daily driving and towing applications.

Cons:
– SP413 is a platinum plug, which typically has a shorter service life than iridium plugs.

Best for: The owner who prefers sticking to OEM plug quality but wants a complete, reliable coil pack solution.

Expert Opinion: When dealing with modular Ford engines, many mechanics feel safest using Motorcraft plugs. Pairing them with high-quality aftermarket coils like the MAS brand provides a reliable, OE-spec baseline that is perfect for stock or lightly modified trucks.

8 pc Autolite Platinum Spark Plugs compatible with Ford F-150 4.6L V8 1993-2010

Autolite has a long history of making reliable OE replacement parts, and this 8-pack of Platinum spark plugs lives up to that reputation. These plugs feature a necked-down center electrode, which allows them to fire quicker and cleaner using less voltage, resulting in easier starts and noticeable acceleration gains. The platinum-to-platinum firing surfaces and the Yttrium enhanced ground electrode dramatically improve durability and heat transfer, helping to maintain the precision gap for a long service interval, although generally shorter than iridium.

Key features that stand out:
– Maximum Performance: Necked-down center electrode for quicker firing and low voltage requirement.
– Platinum-to-Platinum: Ensures virtually no gap erosion and superior durability compared to single platinum plugs.
– Yttrium Enhancement: Yttrium-enhanced ground electrode aids in superior heat transfer and longevity.
– Improved Fuel Economy: Designed to optimize engine performance and improve efficiency.

Pros:
– A very reliable, affordable platinum option from a reputable manufacturer.
– Easy starts and smooth acceleration improvement.
– Excellent gap stability over time due to the platinum construction.

Cons:
– May not handle the extreme heat of supercharged or heavily modified engines as well as iridium.

Best for: Budget-conscious F150 owners seeking a reputable brand and reliable performance boost without needing the maximum lifespan of iridium.

Expert Opinion: Platinum plugs are a reliable mid-tier choice for the 4.6L. Autolite’s implementation here is strong, particularly their focus on gap stability, which is often a challenge with older engine designs. These offer excellent bang for your buck.

8Pcs Spark Plugs SP493 Platinum AGSF32PM Fit For Ford 4.6L 5.4L V8

This is a direct replacement platinum spark plug set that cross-references to the highly common Ford OEM part number SP493 (AGSF32PM). Built with a combination of aluminum and high-quality porcelain, these plugs are designed to resist high temperatures while generating maximum ignition power. The key claim here is the focus on efficiency, with the manufacturer suggesting they can help save up to 20% on fuel—a welcome benefit for any truck owner. They are designed for easy installation and promise superior performance and reliability right out of the box.

Key features that stand out:
– OEM Part Cross-Reference: Directly replaces SP493 AGSF32PM, ensuring perfect fitment.
– Material Quality: High-quality aluminum and porcelain construction resists heat and maximizes ignition power.
– Emissions and Efficiency: Focuses on low emissions output and claimed improvements in fuel savings.
– Reliability: Components match or improve upon the OE design specifications.

Pros:
– Excellent heat resistance properties.
– Attractive pricing for a platinum set.
– Guaranteed compatibility with common Ford part numbers.

Cons:
– The fuel saving claim of 20% is likely exaggerated for a spark plug replacement alone.

Best for: Drivers looking for an affordable, highly-rated platinum plug that guarantees OE compatibility via direct part number replacement.

Expert Opinion: Referencing the exact OE part number is a huge benefit for DIYers. While the fuel efficiency claims are marketing heavy, the fundamental plug design—modeled after the reliable SP493—makes this a trustworthy choice for standard maintenance.

Helpful Comparison Short Insights

Choosing the Best Spark Plugs For 4.6 F150 largely depends on your specific needs: performance, longevity, or budget.

For pure longevity, the Iridium Spark Plugs 8 Pack 7164 TR55IX is hard to beat. Iridium lasts significantly longer than platinum, meaning you won’t have to service your plugs again for potentially 100,000 miles.

However, if your truck is already showing signs of ignition distress (stuttering, poor mileage), opting for a coil and plug set is crucial. The DG508 Ignition Coil Pack & Iridium Spark Plug SP479 Set provides the highest performance and durability combo for a full system replacement.

If you are a traditionalist and trust factory standards, the MAS Ignition Coils DG508 and Motorcraft OEM Spark Plugs SP413 combination is your answer. Motorcraft plugs offer verified OE reliability, paired with upgraded aftermarket coils.

The platinum options—Autolite and the SP493 replacements—are excellent value picks. The 8 pc Autolite Platinum Spark Plugs stand out for their advanced electrode design (Yttrium enhanced), aiming to improve quick starts and throttle response, making them the superior choice among the two standalone platinum sets.

Final Verdict

If your 4.6L F150 is running okay but is due for routine maintenance and you want the longest possible service interval, choose the Iridium Spark Plugs 8 Pack 7164 TR55IX.

If your truck is misfiring or you are completing a major tune-up and need new coils too, the DG508 Ignition Coil Pack & Iridium Spark Plug SP479 Set offers the best overall value and performance.

For the mechanic or enthusiast who prioritizes OEM confidence above all else, the MAS/Motorcraft SP413 combo is the definitive choice for reliability and guaranteed fitment.

Best Spark Plugs For 4.6 F150 FAQ Section

What is the correct spark plug gap for a Ford 4.6L V8 engine?

The correct spark plug gap for the 4.6L V8 Ford engine typically ranges between 0.052 and 0.054 inches. Always double-check your owner’s manual or a specific repair database for the exact specification for your year model, especially if you are using non-OEM plugs. While some plugs come pre-gapped, it is always recommended to verify this measurement before installation.

Should I choose platinum or iridium spark plugs for my 4.6 F150?

Iridium is generally the superior choice. Iridium is harder and more durable than platinum, allowing for a finer center electrode and a much longer lifespan (often rated up to 100,000 miles). Platinum plugs (often rated around 60,000 miles) are a great reliable middle ground, offering better performance than basic copper plugs at a lower cost than iridium. For maximum longevity and consistent ignition performance in the 4.6 F150, iridium is highly recommended.

My F150 has a rough idle—will new spark plugs fix misfires?

New spark plugs are often the primary fix for a rough idle or misfires, especially if they haven’t been changed in a long time. However, on the 4.6L engine, rough running is extremely common when the ignition coil packs (COPs) begin to fail. If replacing the plugs doesn’t solve the issue, the next step is typically inspecting or replacing the coil packs and potentially the fuel injectors. Look for complete coil and plug kits if your truck is high mileage.

How often should I change the spark plugs in my Ford 4.6L V8?

Service intervals depend heavily on the plug material:
* Copper Plugs: Every 30,000 miles.
* Platinum Plugs: Every 60,000–80,000 miles.
* Iridium Plugs: Up to 100,000 miles.
Always refer to the manufacturer’s recommendations for your chosen plug type to ensure optimal engine health and performance from your best spark plugs for 4.6 F150.

Are Motorcraft plugs truly required, or are aftermarket plugs reliable?

While many mechanics and Ford enthusiasts prefer Motorcraft plugs (like the SP413 or SP493) because they guarantee OE compatibility and thread design, high-quality aftermarket plugs from brands like Autolite or NGK are absolutely reliable. The key is to ensure the plug’s heat range and length perfectly match the Ford specifications to prevent damage to the cylinder head, which is a common concern with 4.6L and 5.4L engines.

Do I need to apply anti-seize compound when installing new spark plugs?

For newer generations of spark plugs, especially those with nickel-plated threads (like most modern platinum and iridium plugs), manufacturers typically advise against using traditional anti-seize. The anti-seize compound can interfere with the torque readings, potentially leading to overtightening. If you are using a non-plated plug or have concerns, consult the specific plug manufacturer’s instructions. For the Best Spark Plugs For 4.6 F150, follow the plug company’s directions precisely.