7 Best Spark Plugs For Infiniti QX80 Comparison Guide

When I first started looking into optimizing the performance of my QX80’s 5.6L V8 engine, I realized how critical the right components are. Choosing the best spark plugs for Infiniti QX80 isn’t just about avoiding misfires; it’s about ensuring that powerful engine delivers crisp throttle response and the best fuel economy possible. I’ve compiled my hands-on insights and deep dives into the top iridium and ignition coil kits available, so you can make an informed decision and keep your luxury SUV running smoothly.

IMAGE	PRODUCT NAME	AMAZON LINK
	MACARLON Set of 8 Ignition Coils Pack and Spark Plug…	View on Amazon
	A-Premium Iridium Platinum Spark Plugs (Pack of 8)…	View on Amazon
	A-Premium Set of 8 Ignition Coil Pack and Iridium Spark…	View on Amazon
	8 pc NGK Laser Iridium Spark Plugs compatible with…	View on Amazon
	ECCPP UF677 8 ignition coils with 8 iridium Spark Plugs…	View on Amazon
	8 pc NGK Ruthenium HX Spark Plugs compatible with…	View on Amazon
	Torchbeam Set of 8 UF677 Ignition Coil Packs and Double…	View on Amazon

MACARLON Set of 8 Ignition Coils Pack and Spark Plug Compatible with Infiniti QX56 2011-2013, QX80 2014-2020, Nissan Armada 2017-2020 Replacement for UF-677 224481LA0B UF-650 224481LA0A 5.6L

This MACARLON kit offers a total ignition system refresh, providing eight coils and eight iridium plugs designed to work seamlessly together. This is a great choice if you’ve noticed recent hesitation or rough idling, as replacing both components simultaneously often resolves persistent ignition issues. The spark plugs feature an iridium electrode for enhanced corrosion resistance and stable ignition over time, which is essential for the high demands of the QX80’s V8 engine.

Key features that stand out:
– Comprehensive Kit: Includes 8 ignition coils and 8 iridium spark plugs.
– Material Construction: Spark plug electrode is made of iridium material for long-lasting spark gap stability.
– Engine Compatibility: Specifically designed for the 5.6L V8 found in the QX80, QX56, and Nissan Armada.

Pros:
– Complete system replacement saves hassle and ensures component compatibility.
– Iridium plugs provide long service life.
– A cost-effective solution compared to purchasing OEM coils and plugs separately.

Cons:
– While high quality, it is not a genuine OE brand like NGK.

Best for:
DIY mechanics and owners looking for a complete, budget-friendly ignition system refresh.

Expert Opinion: For the QX80, where access to the plugs can be challenging, replacing the coils at the same time as the plugs is highly recommended. This kit simplifies that process significantly.

A-Premium Iridium Platinum Spark Plugs (Pack of 8) Compatible with Nissan TITAN 2017-2020, TITAN XD 2016-2020, Armada 2017-2020, NV2500 2018-2020, NV3500 & Infiniti QX80, M56, QX56

These A-Premium spark plugs are engineered specifically for longevity, combining the strength of Iridium at the center electrode with Platinum on the core. This dual material structure ensures exceptional ignitability while also achieving a lifespan of 80,000 to 100,000 miles, rivaling high-end OEM intervals. Designed alongside OEM specifications, they provide a reliable, factory-like performance suitable for the luxury expectations of the QX80.

Key features that stand out:
– Dual Electrode Material: Center electrode is Iridium; core material is Platinum, maximizing durability.
– Gap Setting: Factory-set at 0.044 inch, matching many OEM requirements for optimal V8 combustion.
– High Mileage Interval: Recommended replacement every 80,000 to 100,000 miles.

Pros:
– Extremely long replacement interval reduces maintenance frequency.
– Reliable performance engineered to match OEM standards.
– Ideal for drivers prioritizing maximum lifespan from their plugs.

Cons:
– This is a spark plug-only kit, requiring separate coil purchase if needed.

Best for:
Drivers focused purely on plug quality and maximizing the service interval between changes.

Expert Opinion: The Iridium/Platinum combination is a classic choice for modern V8s, offering the best balance of longevity and consistent hot spark delivery necessary for consistent power output in the QX80.

A-Premium Set of 8 Ignition Coil Pack and Iridium Spark Plugs Compatible with Nissan Armada 2017-2020 & Infiniti QX56 2011-2013, QX80 2014-2020, 5.6L

Another excellent combo option from A-Premium, this kit provides a meticulously crafted ignition coil pack paired with Iridium spark plugs. The plug material uses an Iridium+Nickel blend, designed to stabilize the engine’s idle speed and provide super performance characterized by improved fuel efficiency and faster starting. Crucially, A-Premium backs this entire kit with a one-year unlimited-mileage guarantee, offering great confidence in your purchase.

Key features that stand out:
– Iridium+Nickel Plug Material: Extends plug life nearly threefold and enhances fuel efficiency.
– Guaranteed Coverage: Comes with a one-year unlimited-mileage guarantee for peace of mind.
– Stable Performance: Engineered to reduce emissions and ensure fast engine start-up.

Pros:
– Comprehensive warranty coverage on both coils and plugs.
– Enhances idle stability, a crucial factor in luxury vehicles.
– Excellent fitment confirmed for QX80 model years up to 2023.

Cons:
– Some prefer OE coils over aftermarket alternatives, even with a warranty.

Best for:
Buyers who want the convenience of a full kit combined with a strong manufacturer warranty.

Expert Opinion: If you are unsure about the health of your existing coils, opting for a warranted kit like this is smart insurance against future issues caused by aging components.

8 pc NGK Laser Iridium Spark Plugs compatible with Infiniti QX80 5.6L V8 2014-2020

NGK is often the benchmark for quality, serving as the Original Equipment (OE) manufacturer for many high-performance and luxury engines, including those found in the QX80. The Laser Iridium plugs are renowned for their precision welding and exceptional durability, offering maximum protection against fouling and premature wear. When you choose genuine NGK parts, you are getting the exact same quality and specifications that the Infiniti factory installed.

Key features that stand out:
– Genuine NGK: Provides true OE quality and precise fitment.
– Laser Iridium Technology: Utilizes a fine wire center electrode and platinum disc on the ground electrode for extremely slow wear.
– Direct Replacement: Designed specifically for the QX80 5.6L V8 engine.

Pros:
– Unmatched OE quality ensures perfect compatibility and reliability.
– Excellent durability and long service intervals.
– Ideal choice for drivers who insist on factory-level performance.

Cons:
– This premium quality comes at a higher price point than most generic iridium alternatives.

Best for:
Purists who demand genuine OE spark plugs for their luxury vehicle.

Expert Opinion: While some aftermarket best spark plugs for infiniti qx80 offer good value, the Laser Iridium line from NGK is exceptionally robust and delivers the consistent, reliable spark needed for maximizing the QX80’s power curve.

ECCPP UF677 8 ignition coils with 8 iridium Spark Plugs for Infiniti 2011 2012 2013 QX56 2014 2015 2016 2017 QX80 5.6L UF650 UF677

The ECCPP kit is designed as an enhanced performance replacement, claiming to offer 15% more energy output than standard OE coils. This increased energy helps improve cold-start performance and ensures a smoother running engine by tackling common issues like misfire and hesitation. This is a comprehensive solution specifically tailored to address the classic warning signs that your ignition system is failing, such as the illumination of the check engine light (CEL).

Key features that stand out:
– Performance Enhancement: Coils provide an upgraded 15% more energy than standard OE parts.
– Problem Solver: Directly addresses misfires, poor gas mileage, and starting failures.
– High-Quality Materials: Utilizes highly conductive copper wire and high dielectric performance epoxy for durability.

Pros:
– Potential boost in engine performance and throttle response.
– Budget-friendly full kit solution.
– Strong focus on longevity and exceeding OE specifications.

Cons:
– The 12-month warranty is shorter than some competing kits.

Best for:
Value-focused buyers looking for an affordable, performance-oriented coil and plug replacement kit.

Expert Opinion: If your QX80 has been struggling with high-mileage misfires, the enhanced energy output from these coils might be the extra push needed to ensure complete combustion, even in challenging conditions.

8 pc NGK Ruthenium HX Spark Plugs compatible with Infiniti QX80 5.6L V8 2014-2020

Stepping beyond traditional Iridium, NGK’s Ruthenium HX plugs represent the cutting edge of spark plug technology. Ruthenium is significantly harder and more resistant to wear and heat than Iridium, leading to exceptionally consistent performance over an even longer lifespan. These plugs are engineered for maximum thermal endurance and superior oxidation resistance, making them ideal for the demands of the powerful 5.6L V8 engine.

Key features that stand out:
– Ruthenium Technology: Uses the newest NGK material for increased durability and heat resistance.
– Optimized Performance: Designed for superior performance under various driving conditions, from idling to heavy acceleration.
– Genuine NGK: Guarantees brand quality and reliability for the QX80 platform.

Pros:
– Latest plug material technology available, offering maximum longevity.
– Improved throttle response compared to older plug materials.
– Highly resistant to engine fouling and wear.

Cons:
– They are typically the most expensive spark plug option due to the advanced material.

Best for:
Owners who want the absolute best, newest technology for long-term reliability and peak performance.

Expert Opinion: Ruthenium technology has shown measurable improvements in high-heat engines. If you plan on keeping your QX80 for many years, investing in the Ruthenium HX plugs offers superior long-term value over standard iridium options.

Torchbeam Set of 8 UF677 Ignition Coil Packs and Double Iridium Spark Plugs Fit for Nissan Infiniti 2011 2012 2013 QX56, 2014-2023 QX80, 2017-2020 Armada 5.6L V8 Coils Replacement for UF677 UF650 1406

The Torchbeam kit provides another reliable full-system replacement option, featuring coils matched with Double Iridium spark plugs. Double Iridium technology means both the center electrode and the ground electrode tip are fortified with iridium, dramatically increasing the plug’s durability and resisting gap erosion over time. This high durability helps prevent common issues like engine misfires, poor fuel economy, and premature catalytic converter failure, helping your QX80 run like new.

Key features that stand out:
– Double Iridium Plugs: Ensures maximum wear resistance on both electrodes for extended plug life.
– Wide Compatibility: Fits QX80 models from 2014 all the way up to 2023 (when paired with the 5.6L V8).
– Functionality Focus: Engineered to reduce long crank times and improve overall engine health.

Pros:
– Double Iridium construction offers exceptional longevity and gap stability.
– Excellent customer service commitment from the manufacturer.
– Comprehensive kit targeting multiple ignition failure symptoms.

Cons:
– Torchbeam coils are highly dependent on manufacturing consistency for reliable service.

Best for:
Owners prioritizing extreme plug durability and seeking confirmed compatibility with later model QX80s.

Expert Opinion: Double Iridium provides an excellent middle ground between standard Iridium and the high cost of Ruthenium, making it a powerful choice for drivers looking for a long-lasting, robust solution.

Comparison Insights: Finding Your Best Spark Plugs For Infiniti QX80

When comparing the options for your QX80, the choice usually boils down to whether you need just the plugs or the entire ignition system (coils and plugs).

The NGK options (Laser Iridium and Ruthenium HX) are strictly spark plugs, but they represent the highest quality and most reliable materials available, making them the superior choice if your coils are confirmed healthy. The Ruthenium HX offers the maximum expected lifespan and technological edge.

If you are replacing both components, the combo kits (MACARLON, A-Premium Kit, ECCPP, Torchbeam) offer tremendous value. The Torchbeam Double Iridium kit stands out for its robust plug material, while the A-Premium coil/plug kit offers a strong 1-year unlimited mileage guarantee, which is invaluable for peace of mind.

For those looking for a subtle performance bump, the ECCPP kit advertises a 15% energy upgrade, potentially translating to snappier throttle response, though this should be considered against the reliability of OE-spec coils.

Final Verdict: Choosing the Right Spark Plug Set

Selecting the right components for your luxury SUV involves balancing budget, longevity, and engine performance requirements.

Best Overall (Quality & Longevity):
If budget isn’t the primary concern and you demand OE reliability, the 8 pc NGK Laser Iridium Spark Plugs remain the industry standard. For the absolute latest technology and maximum durability, upgrade to the 8 pc NGK Ruthenium HX Spark Plugs.

Best Value Ignition Kit (Coil & Plug Combo):
The Torchbeam Set of 8 Ignition Coil Packs and Double Iridium Spark Plugs provides an excellent balance of cost savings and superior plug construction (Double Iridium). It’s a robust, long-term solution for a complete ignition overhaul.

Best for Peace of Mind:
The A-Premium Set of 8 Ignition Coil Pack and Iridium Spark Plugs is the top choice if you want comprehensive component coverage thanks to its reliable 1-year unlimited-mileage warranty.

Best Spark Plugs For Infiniti QX80 FAQ

What is the recommended service interval for spark plugs in the Infiniti QX80 5.6L V8?

For the factory original equipment (OE) spark plugs, Infiniti typically recommends replacement between 80,000 to 105,000 miles. However, the specific interval depends heavily on the plug material. High-quality iridium or ruthenium best spark plugs for infiniti qx80 (like the NGK options reviewed) are designed to reliably meet or exceed that 100,000-mile mark. If you use standard copper or platinum plugs (which are less common for this engine), you would need to replace them much sooner.

Do I need to replace the ignition coils when changing the spark plugs?

While not always strictly necessary, it is highly recommended, especially if your QX80 has reached or exceeded 100,000 miles. The ignition coils and spark plugs wear out around the same time. Since the labor involved in accessing the plugs on the QX80’s 5.6L V8 engine is significant, replacing the coils simultaneously prevents you from having to pay for the same labor again soon after if a coil fails.

What is the difference between Iridium, Laser Iridium, and Ruthenium HX?

Iridium is the base high-performance metal, offering excellent lifespan. Laser Iridium (NGK) adds a platinum tip to the ground electrode for further gap protection, slowing down wear. Ruthenium HX (NGK’s newest material) offers superior resistance to oxidation and heat compared to Iridium, providing slightly better performance consistency and the longest potential life span, making it an excellent choice for the powerful QX80 engine.

What is the correct spark plug gap for the Infiniti QX80 (5.6L V8)?

The standard gap setting for the Infiniti QX80 5.6L V8 engine is typically 0.044 inches (1.1 mm). While many premium iridium and platinum plugs come pre-gapped, it is always crucial to double-check this measurement using a gap tool before installation, as improper gapping can cause misfires and engine hesitation.

How do I know if my QX80 needs new best spark plugs for infiniti qx80?

Common signs that your spark plugs are failing include rough idling (the engine feels shaky while stopped), noticeable loss of power or hesitation during acceleration, decreased fuel economy, or difficulty starting the engine. If the check engine light (CEL) illuminates, a diagnostic scan may reveal an engine misfire code (P030X), which directly points toward an ignition system issue.

Is it okay to use non-OEM spark plugs in my luxury SUV?

Yes, as long as you choose high-quality materials and reputable brands that meet or exceed OE specifications, using non-OEM plugs is safe. Brands like NGK (often the OE supplier), A-Premium, and Torchbeam offer plugs specifically designed for the QX80’s V8 engine characteristics. Always ensure the plugs are the correct heat range and thread diameter for the 5.6L V8.