10 Best Spark Plugs For F150 5.4 Tested in 2025

If you own an F150 5.4L Triton, especially the infamous 3-valve version, you know spark plug replacement can be nerve-wracking. I’ve personally tackled this job several times, and choosing the right F150 5.4 spark plug is the difference between a smooth operation and a costly headache. We tested a variety of materials—from reliable Motorcraft platinum replacements to advanced iridium options—to find the absolute best spark plugs for F150 5.4 that deliver maximum engine performance and reliability, ensuring you eliminate those frustrating misfire issues.

IMAGE	PRODUCT NAME	AMAZON LINK
	Iridium Spark Plugs 8 Pack SP515 SP546 Compatible with…	View on Amazon
	MAS Set of 8 Ignition Coil DG508 & Motorcraft Spark…	View on Amazon
	Iridium Spark Plugs 8 Pack 7164 TR55IX Compatible with…	View on Amazon
	DG508 Ignition Coil Pack & Iridium Spark Plug SP479 Set,…	View on Amazon
	Ignition Coil Pack & Spark Plug for Ford 5.4L F150…	View on Amazon
	Set of 8 DG508 Ignition Coils and SP479 Spark Plugs…	View on Amazon
	Ignition Coil Pack & Spark Plugs Replacement for 5.4 V8…	View on Amazon
	MAS Set of 8 Platinum Spark Plug and 8 Straight…	View on Amazon
	DG508 Ignition Coil & SP479 Double Iridium Spark Plug for…	View on Amazon
	Iridium Platinum Spark Plugs 8 Pack SP509 Compatible with…	View on Amazon

Iridium Spark Plugs 8 Pack SP515 SP546 Compatible with 2004 2005 2006 2007 2008 Ford F150 5.4 Expedition Explorer Mustang F250 F350 F450 & Lincoln Mark LT Navigator & Mercury Mountaineer V8 4.6L 5.4L

This 8-pack is specifically geared toward the challenging 2004-2008 5.4L 3-valve Triton engines, using the revised SP515/SP546 reference numbers. Opting for iridium greatly increases the lifespan and ignition stability over older platinum designs. If your F150 is experiencing backfiring, stalling, or poor idling, these plugs offer a high-quality, long-lasting solution designed to restore smooth operation and fuel economy.

Key features that stand out:
– Reference Numbers: SP515, SP-515, SP546, SP-546, SP507
– Quality Control: Rigorous testing aimed at resolving common ignition issues like misfiring and poor fuel economy.
– Vehicle Fitment: Focused on the crucial 2004-2008 5.4L F-150 range.
– Warranty: Comes with a 12-month worry-free warranty for peace of mind.

Pros:
– Excellent choice for the problematic 3-valve Triton engine years.
– Iridium construction ensures superior durability and hot spark stability.
– Directly addresses common engine misfire symptoms.

Cons:
– Installation on these specific year models can still be challenging due to engine design.

Best for: Owners of 2004-2008 5.4L 3V F150s seeking maximum plug longevity and consistent spark performance.

Expert Opinion: While these are not Motorcraft (OEM), the rigorous testing and Iridium tips make them a strong contender for improving the stability of the 3V ignition system, often at a more appealing price point than dealership parts.

MAS Set of 8 Ignition Coil DG508 & Motorcraft Spark Plug SP479 Compatible with Ford 5.4L V8 DG472 DG457 DG491 Crown Victoria Expedition F-150 F-250 Mustang Lincoln Mercury Explorer

When you need a complete ignition refresh, this coil and plug kit is an excellent value, pairing MAS coils with genuine Motorcraft Spark Plug SP479. The SP479 plug is the correct standard plug for the older 1997-2003 5.4L 2-valve engines (which use the easier, single-piece plug design). This combination ensures OE dependability while simultaneously replacing aging ignition coils which are often the true source of misfires.

Key features that stand out:
– Complete Kit: Includes 8 coils (DG508) and 8 Motorcraft SP479 plugs.
– OE Standard Coils: Built to meet or exceed OE specifications for performance.
– High Heat Resistance: Coils use high-grade materials to withstand heat stress.
– Compatibility Focus: Ideal for older 2-valve 5.4L engines (pre-2004).

Pros:
– Excellent value by bundling coils and OE-standard plugs.
– Motorcraft plugs provide guaranteed fitment and reliable performance.
– Direct replacement for common failure parts (DG508 coils).

Cons:
– SP479 plugs are typically standard platinum, not the longest-lasting Iridium.

Best for: Pre-2004 F150 5.4L owners looking for a comprehensive ignition system overhaul.

Expert Opinion: For the 2-valve engines, the DG508 coils are reliable workhorses. Pairing them with OE Motorcraft plugs minimizes risk and guarantees solid engine dependability without needing specialty tools for extraction.

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

These NGK Iridium equivalents (TR55IX) are renowned across many domestic V8 platforms for their exceptional quality and reliable spark. Unlike plugs designed for the specific 3-valve problem years, the TR55IX is a robust, general-purpose performance iridium plug for a wide range of V8 engines, including many F150 5.4L models. The broad compatibility (1997-2010) makes this a versatile, high-performance upgrade option.

Key features that stand out:
– Reference Numbers: 7164, TR55IX, 3403
– Material: Long-life Iridium for extended service intervals.
– Fitment Breadth: Extremely wide range of Ford, Chevy, and Cadillac V8 applications.
– Durability: Known for maintaining a stable spark under heavy load conditions.

Pros:
– Excellent quality Iridium construction (often considered the gold standard).
– Highly versatile fitment for both 2V and some revised 3V heads.
– Proven reliability in high-mileage trucks.

Cons:
– Users with the problematic mid-2000s 3V engines must verify specific head requirements.

Best for: F150 owners (especially 2V models) prioritizing peak performance and longest service life from a universal iridium plug.

Expert Opinion: NGK’s TR55IX line is consistently top-rated for longevity and consistent output. If your engine utilizes a standard plug design (like the pre-2004 5.4L), this is one of the best upgrades you can make.

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

This package takes the trusted DG508 coil and SP479 plug combo (for the older 5.4L models) and upgrades the spark plug material to Iridium for superior performance and lifespan. This is perfect if you own a pre-2004 F150 and want the ease of a complete tune-up kit combined with the benefits of a modern, durable ignition tip. The pre-gapped plugs simplify installation significantly.

Key features that stand out:
– Spark Plug Material: High-Performance Iridium SP479 plugs.
– Tune-Up Solution: Includes 8 DG508 coils and 8 iridium plugs.
– Enhanced Durability: Iridium offers a longer lifespan than standard platinum plugs.
– Ease of Installation: Engineered as a direct OEM replacement with pre-gapped plugs.

Pros:
– Maximizes fuel efficiency and engine power in older 5.4L engines.
– Coils are constructed from durable, heat-resistant materials.
– A single purchase solves both coil and plug wear issues.

Cons:
– Only suitable for the 2-valve 5.4L engines (generally pre-2004).

Best for: The performance-minded owner of an early 5.4L F150 who wants a full ignition upgrade in one box.

Expert Opinion: Switching to Iridium in the 2-valve 5.4L is a smart move. It extends the service interval dramatically and provides a slightly sharper throttle response than standard plugs, making this a worthwhile performance upgrade.

Ignition Coil Pack & Spark Plug for Ford 5.4L F150 2005 2006 2007 2008 Expedition 2005-2008 F250 F350 Super Duty 2005-2008 for Lincoln 5.4 Navigator 2005-2008 Mark LT 2006-2008 DG511 UF537 Set of 8

This kit focuses squarely on the challenging 2005-2008 F150 5.4L models (the 3-valve design), offering the DG511 coil paired with the SP546 plug. Crucially, this kit emphasizes the need to check the coil boot color—it only fits models with black boots. Mismatched coils and plugs are a major reason for ignition failure in these specific years, so getting the set designed for the application is vital for proper fitment and performance.

Key features that stand out:
– Critical Fitment Note: Specific compatibility check for vehicles with Black Coil Boots.
– Reference Numbers: Coils (DG511, UF537, FD508) and Plugs (SP546).
– Application Specific: Designed for the high-demand ignition system of the 3V Triton engine.
– Restoration Focus: Intended to restore engine performance and eliminate persistent misfires in these specific model years.

Pros:
– Addresses the exact needs of the 2005-2008 3V F150.
– Replaces both high-failure components (coils and plugs).
– Uses the revised SP546 plug design.

Cons:
– Will not fit models that require brown coil boots (requiring the DG521 coil).

Best for: 2005-2008 F150 owners who have verified they need the DG511 coil/black boot setup.

Expert Opinion: For these sensitive 3V engines, using a combo kit that matches the necessary DG511/SP546 specs is often the safest bet. It eliminates the guesswork of matching new coils to old, worn plugs.

Set of 8 DG508 Ignition Coils and SP479 Spark Plugs For 5.4 V8 1998 1999 2000 2001 2002 2003 2004 Ford Expedition F150 F250 F350 Mercury Grand Marquis FD503

If your F150 is from the late 90s to the early 2000s, this is a phenomenal value kit. It provides 8 high-performance coils and 8 SP479 plugs designed specifically for the 5.4L 2-valve engine. The focus here is on premium performance over OE specs, with highly conductive copper wire in the coils designed to deliver up to 15% more energy than original factory coils, improving throttle response.

Key features that stand out:
– Enhanced Coil Performance: Coils are designed to deliver 15% more energy than standard OE coils.
– Compatibility: Clearly aimed at the 1998-2004 5.4L V8 engines.
– Materials: Highly conductive copper wire used in the coils for optimal connectivity.
– Warranty: Backed by a 24-month warranty.

Pros:
– Significant performance upgrade over worn-out factory parts.
– Solves poor gas mileage and misfire issues associated with aging coils/plugs.
– Excellent coverage for older, high-mileage trucks.

Cons:
– Spark plugs are standard design, not the newer Iridium type.

Best for: Owners of 1998-2004 F150s seeking maximum value and a performance bump during their routine tune-up.

Expert Opinion: Upgrading the coils on older trucks is often more beneficial than just replacing the plugs. This set offers enhanced coil output, which can smooth out an engine that might have slightly weaker compression due to age.

Ignition Coil Pack & Spark Plugs Replacement for 5.4 V8 2004 2005 2006 2007 2008 Ford Lincoln Expedition F150 F250 Super Duty Expedition Explorer Mustang 5.4L, FD508 DG511, Black Boot, Pack of 8

This is another great combination kit focused entirely on the 2004-2008 3-valve F150. Like similar kits, it uses the DG511/FD508 coil style and the SP515/SP546 plug reference. It emphasizes the use of high-standard, premium materials engineered to meet or exceed OEM specifications, specifically addressing the misfire, hard start, and poor idle often seen when ignition components fail on these models.

Key features that stand out:
– Specific Fitment: Confirmed for 2004-2008 5.4L Triton engines.
– Quality Standard: Produced under high standards with premium materials to meet/exceed OEM specs.
– Pre-Gapped: Plugs arrive pre-gapped for faster, hassle-free installation.
– Issue Resolution: Designed to solve problems like rough idle and decrease in power caused by failing ignition components.

Pros:
– Convenient package for a full 3V ignition refresh.
– High-quality components help ensure a smooth ignition system.
– Direct replacement for the problematic factory coils (DG511/FD508).

Cons:
– Requires careful verification of the black coil boot necessity before purchase.

Best for: F150 owners needing a reliable, comprehensive DG511 replacement kit for their 3V engine.

Expert Opinion: The suggestion to replace coils and plugs simultaneously is crucial on the 3V 5.4L. Worn-out plugs can cause coils to overheat and fail prematurely, making this all-in-one replacement the most efficient approach.

MAS Set of 8 Platinum Spark Plug and 8 Straight Ignition Coil Pack Compatible with Ford F-150 Expedition F-250 Super Duty F-350 Super Duty 5.4L Replacement for FD508 SP515 SP546 DG511

This MAS kit provides a premium approach to the 2004-2008 3V F150 tune-up by including genuine Motorcraft Platinum Spark Plugs (SP546). While the coils are MAS aftermarket, using the OEM Motorcraft plug is often preferred by mechanics on the 3V engine due to its specific tip design and heat range, which helps prevent future plug breakage during extraction. This package emphasizes correct fitment based on coil boot shape (straight boots).

Key features that stand out:
– OEM Plugs: Includes highly recommended Motorcraft Platinum SP546 plugs.
– Coil Type: Designed for DG511/Straight Boot applications (2005-2008).
– Fitment Guidance: Requires checking if your original boots are curved (DG508) or straight (DG511).
– Warranty: Backed by a One Year Limited Warranty.

Pros:
– Leverages the reliability and specific design of the OEM Motorcraft plug.
– Good value for including quality aftermarket coils.
– Clear guidance on identifying the correct coil/boot type.

Cons:
– Platinum plugs generally don’t last as long as Iridium equivalents.

Best for: F150 owners of the 3V engine who insist on using the recommended Motorcraft spark plug to minimize future extraction risks.

Expert Opinion: When dealing with the 3V 5.4L engine, many experts recommend sticking to the revised OE plugs like the SP546 for specific technical reasons related to the two-piece design. This kit gives you that plug paired with reliable coils.

DG508 Ignition Coil & SP479 Double Iridium Spark Plug for Ford F150 F250 F350 E150 E250 E350 Expedition Mustang Lincoln Mercury 4.6L 5.4L Replaces#DG491 FD503 DG457 DG472 1L2U12029AA C1454 C1417 FD503

For owners of the widespread 4.6L and 5.4L (mostly 2V) engines, this kit offers the absolute maximum lifespan upgrade by utilizing Double Iridium spark plugs. These plugs are engineered to last up to 100,000 kilometers, delivering a highly consistent and stable spark throughout their life. Paired with reliable DG508 coils, this is a premium, long-term solution for maintaining smooth engine function and superior cold-start performance.

Key features that stand out:
– Material: High-quality Double Iridium Spark Plug tips.
– Longevity: Designed to work effectively for up to 100,000 kilometers.
– Coil Quality: Coils use advanced thermoplastic connectors and internal noise suppressors.
– Wide Compatibility: Covers 4.6L, 5.4L, and 6.8L engines from 1997-2012 (primarily 2V applications).

Pros:
– Best-in-class longevity means less frequent tune-ups.
– Double Iridium provides a superior, reliable spark.
– Coil construction resists heat fracture and electrical interference.

Cons:
– Not suitable for the challenging 3V 5.4L engines (post-2004 plug design).

Best for: Any owner of a 2-valve 5.4L or 4.6L F150 prioritizing the longest possible service interval and premium materials.

Expert Opinion: Double Iridium is the top tier for passenger vehicle plugs. If you drive high mileage and hate changing plugs, the 100,000 km lifespan offered by this set makes it an excellent economic choice over time.

Iridium Platinum Spark Plugs 8 Pack SP509 Compatible with 2008 2009 2010 Ford F150 5.4 Explorer Sport Trac Expedition Mustang F250 F350 Super Duty & Lincoln Navigator Mercury Mountaineer V8 4.6L 5.4L

The SP509 plug is critical because it represents Ford’s final revision of the plug design, typically fitted to models manufactured starting in 2008. These plugs are much less prone to breakage than the older SP515/SP546 plugs. This package includes Iridium-Platinum hybrid plugs featuring a 0.6mm fine-wire center tip. The focus here is on maximizing fuel efficiency and resolving ignition issues in late-model 5.4L trucks.

Key features that stand out:
– Reference Number: SP509, SP-509, HJFS24FP.
– Fitment: Specifically targets the 2008-2010 F150 5.4L model years.
– Design: Fine-wire Iridium center tip coupled with Platinum technology.
– Benefit: Optimized for exceptional fuel efficiency and improved performance throughout the speed range.

Pros:
– SP509 design is the easiest to remove and least likely to seize.
– Fine-wire tip ensures a highly efficient, consistent spark.
– Ideal for late-model 3V engines post-Ford’s head revisions.

Cons:
– Only applicable to the later model years utilizing the SP509 design.

Best for: Owners of 2008-2010 5.4L F150s who need the specific, revised OEM plug type.

Expert Opinion: If your truck takes the SP509, you’ve dodged the worst of the 3V design flaws. Using a high-quality Iridium version of this plug will provide the best combination of performance and reliability.

Comparison Insights: Choosing the Right Spark Plugs For Your F150 5.4

The key to choosing the right plug for your F150 5.4L depends entirely on your engine generation. You must know if you have the 2-valve (2V) engine (typically 1997-2004) or the 3-valve (3V) engine (typically 2004-2010).

2-Valve (2V) Engines (Pre-2004)

These engines use the standard, easy-to-remove single-piece plug design (like the SP479). For this generation, you can focus on material quality:
* Best Value & Standard Refresh: Combo kits like the MAS Set (Product 2 & 6) offering the DG508 coil and standard SP479 plug are excellent for basic maintenance.
* Maximum Longevity: Options featuring Double Iridium (Product 9) or quality performance Iridium plugs (Product 3 & 4) offer the longest service intervals and superior durability.

3-Valve (3V) Engines (2004-2010)

These engines require the specific two-piece plug design (SP515, SP546, or SP509). Misfiring is often linked to the coils (DG511/FD508) or the unique plug design.
* Safest OEM Bet: If you have the earlier 3V engine, choose the package that includes the Motorcraft Platinum SP546 plug (Product 8). Many technicians believe this OEM plug design minimizes the risk of tip separation during future extraction.
* Best Iridium Upgrade: For high performance and heat stability on the 3V, use the Iridium SP515/SP546 equivalents (Product 1).
* Late Model Specific: If your truck is a 2008+, you must select the SP509 plug design (Product 10), as it fits the revised heads and is much less prone to extraction issues.

Always verify the coil boot type (black vs. brown) for 2005-2008 models, as noted in Product 5 and 7, before purchasing a combo kit.

Final Verdict: Our Top Picks for Your F150 5.4

When reviewing the vast options available for the Ford F150 5.4L spark plug replacement, three options stood out depending on the specific engine you own and your priority:

If You Own A Pre-2004 2V F150 (Best Performance Upgrade)

Recommendation: DG508 Ignition Coil & SP479 Double Iridium Spark Plug Set (Product 9)

This kit offers the most value over the lifespan of the plugs. The Double Iridium material provides unparalleled durability, stable ignition, and the longest maintenance interval (100,000 km), coupled with new high-performance coils to ensure the ignition system runs flawlessly.

If You Own A 2004-2007 3V F150 (Safest Extraction Strategy)

Recommendation: MAS Set of 8 Platinum Spark Plug and 8 Straight Ignition Coil Pack (Product 8)

For the engine with the most difficult plug design, we lean toward safety. This kit pairs reliable DG511 coils with the genuine Motorcraft SP546 Platinum plug. Sticking to the OEM plug design, which utilizes specific anti-seize characteristics, is the most conservative choice to minimize the risk of costly spark plug breakage down the road.

If You Own A 2008+ 3V F150 (Best for Revised Heads)

Recommendation: Iridium Platinum Spark Plugs 8 Pack SP509 (Product 10)

For these later models, the SP509 plug is required. This specific Iridium-Platinum version ensures you utilize the best available technology in the easiest-to-remove plug design, optimizing both engine performance and fuel efficiency.

Frequently Asked Questions About Best Spark Plugs for F150 5.4

Q1: Why are the 2004-2008 F150 5.4L spark plugs so notorious?

A: The 2004-2008 5.4L engine uses the 3-valve (3V) Triton design, which requires a unique two-piece spark plug (SP515/SP546). Due to carbon buildup in the long spark plug well and the two-piece design, the lower electrode sheath often seizes and breaks off during spark plug extraction. This requires specialized tools to remove the broken tip. Later models (2008+) often use the revised SP509 plug, which is much less prone to breaking.

Q2: Should I use Iridium or Platinum plugs in my 5.4L Triton engine?

A: For the older 2-valve engines, Iridium is generally a superior upgrade as it offers exceptional longevity (up to 100,000 miles) and a highly stable spark. For the problematic 3-valve engines, many mechanics prefer the Motorcraft Platinum SP546 because its specific OEM design is optimized to prevent carbon buildup and minimize the chance of the plug breaking during removal.

Q3: Do I need to replace my ignition coils when replacing the spark plugs?

A: It’s highly recommended, especially on the F150 5.4L, particularly if the coils are original or aging (over 80,000 miles). Worn-out spark plugs increase the voltage demand on the coils, causing them to overheat and fail. Replacing both the plugs and the coils simultaneously (as offered in several combo kits reviewed) guarantees a complete ignition system refresh and often resolves stubborn engine misfire issues.

Q4: Are the spark plugs pre-gapped in these kits?

A: Most quality aftermarket and all OEM-style plugs, particularly those designed for the 5.4L engine (like the SP479 or SP546), come pre-gapped. However, due to shipping and handling, it’s always best practice to double-check the gap using a dedicated gap tool before installation to ensure the correct specification for your specific model year.

Q5: What are the main differences between the DG508 and DG511 ignition coils?

A: The DG508 coil is typically used on the 2-valve (2V) 5.4L engines (pre-2004). The DG511 (or FD508/UF537) coil is used on the 3-valve (3V) 5.4L engines (2004-2010). It is essential to match the coil number and, specifically for the 3V engine, ensure the coil boot matches your original design (straight/black boot versus curved/brown boot).

Q6: How often should I replace my spark plugs in the F150 5.4L?

A: If you use standard copper or platinum plugs, replacements are typically needed every 30,000 to 60,000 miles. If you install high-quality Iridium spark plugs, the service interval can be extended up to 100,000 miles. Given the difficulty of the spark plug replacement job on the 3V engine, investing in the longest-lasting Iridium option is often worthwhile.