If you’re driving an Infiniti QX80, you know how important it is to keep that powerful 5.6L V8 engine running smoothly. The right spark plugs can make a huge difference in performance, fuel efficiency, and longevity, especially for this luxury SUV that handles everything from city commutes to long highway trips. After testing various options, we’ve rounded up the best spark plugs for Infiniti QX80 that balance quality, compatibility, and value, helping you avoid misfires and get back to enjoying the drive.
Quick Product Comparison
Our Top 5 Best Spark Plugs For Infiniti Qx80 – Expert Tested & Recommended
1. 8-Pack UF677 UF650 Ignition Coils & Iridium Spark Plugs for 5.6L V8 Infiniti QX56, QX80, Armada
✓ Key Features
✓ High-Quality Materials: Utilizes high-grade epoxy resin and engineering plastic for low emissions and high energy output, ensuring reliable performance under all conditions.
✓ Perfect Compatibility: Designed for 5.6L V8 engines in Infiniti QX56, QX80, and Armada, with compatible part numbers like 22448-1LA0A, UF650, and UF677.
✓ Complete 8-Pack Set: Includes both ignition coils and iridium spark plugs, making it a full replacement kit for easy installation.
✓ Durability for Daily Use: Built for outstanding reliability, helping prevent misfires and improving engine smoothness over time.
🎯 Best For
This kit is ideal for Infiniti QX80 owners looking for a comprehensive upgrade that tackles both coils and plugs at once, especially if you’re dealing with rough idling or reduced power on long drives. It’s a smart pick if you want something straightforward that fits right in without hassle.
2. 8 UF677 UF650 Ignition Coils & Iridium Spark Plugs for Infiniti QX80 2014-2021, QX56, Nissan Armada 5.6L V8
✓ Key Features
✓ Precise Vehicle Fitment: Tailored for 2014-2021 Infiniti QX80, 2011-2013 QX56, and 2017-2020 Nissan Armada with 5.6L V8, ensuring seamless integration.
✓ OEM Reference Numbers: Matches parts like 224481LA0B and UF-677, with epoxy resin exterior for superior heat resistance and performance.
✓ Enhanced Ignition Performance: High-strength materials provide consistent spark, reducing energy loss and improving throttle response.
✓ Reliable Daily Durability: Engineered for long-term use, minimizing breakdowns and maintaining smooth operation in various conditions.
🎯 Best For
If your Infiniti QX80 is from the mid-2010s and you’re noticing hesitation during acceleration, this set is perfect for a thorough refresh. It’s great for drivers who prioritize OEM-like reliability without breaking the bank.
3. NGK LKAR7BIX-11S Iridium IX Spark Plugs 4-Pack for Enhanced Engine Performance and Longevity
✓ Key Features
✓ Iridium Tip Technology: 0.6mm laser-welded fine iridium tip for extreme ignitability and consistent stable spark, boosting throttle response.
✓ Anti-Fouling Design: Tapered ground electrode and longer insulator nose prevent fouling and flashover for cleaner operation.
✓ Triple Gasket Seal: Eliminates combustion gas leakage, ensuring efficient performance and reduced emissions.
✓ Proven Longevity: Built for high durability, ideal for maintaining peak engine health in demanding drives.
🎯 Best For
This 4-pack suits budget-conscious Infiniti QX80 drivers who want premium iridium plugs without the full set cost, perfect for partial replacements or testing the waters. It’s especially helpful if you’re on a tight schedule and need quick, reliable fixes for minor performance dips.
4. A-Premium 8-Pack Iridium Platinum Spark Plugs for Nissan Titan, Armada, Infiniti QX80 5.6L V8 Engines
✓ Key Features
✓ Iridium-Platinum Construction: Center electrode with iridium tip and platinum core for superior conductivity and extended lifespan.
✓ Broad Compatibility: Fits Infiniti QX80 5.6L V8, plus Nissan Titan, Armada, and models like FX50 and M56, with references like LKAR7BIX-11S.
✓ Optimal Specifications: 5000 ohms resistance and 0.044-inch gap for precise ignition and efficient combustion.
✓ Easy Full Replacement: 8-pack pre-gapped plugs ensure hassle-free installation and consistent performance.
🎯 Best For
This is a solid choice for Infiniti QX80 enthusiasts who share parts with Nissan vehicles and want durable plugs that handle heavy towing or off-road adventures. If you’re upgrading from stock and need something versatile across your garage, these deliver without overcomplicating things.
5. Set of 8 UF677 UF650 Ignition Coils & Spark Plugs for 5.6L V8 Infiniti QX56 2011-2013, QX80, Nissan Armada
✓ Key Features
✓ Full Kit Inclusion: Comes with 8 ignition coils (4 front, 4 rear) and 8 pre-gapped spark plugs for complete 5.6L V8 coverage.
✓ Interchangeable Parts: Replaces UF677, UF650, and OEM numbers like 224481LA0A/B, fitting 2011-2020 Infiniti QX models and Nissan Armada.
✓ Robust Build Quality: High-output design reduces misfires and supports efficient fuel use in demanding SUV applications.
✓ User Feedback on Fit: Generally reliable, though some note length variations—always verify with your model’s specs for peace of mind.
🎯 Best For
This set works well for older Infiniti QX80 or QX56 owners facing coil failures alongside plug wear, offering a bundled solution for cost savings. It’s suited for DIY mechanics who appreciate the convenience but should double-check fitment to avoid any surprises.
Complete Buying Guide for Best Spark Plugs for Infiniti QX80
Essential Factors We Consider
When picking the best spark plugs for Infiniti QX80, we focus on compatibility with the 5.6L V8 engine, material quality like iridium for longevity, and heat range to match your driving style. Look for pre-gapped options to save time, and check reviews for real-world reliability—things like anti-fouling designs help in stop-and-go traffic common for this SUV. We also weigh kits that include coils if you’re tackling multiple issues at once, ensuring better value without skimping on performance.
Budget Planning
Expect to spend $50-100 for a basic 4-pack of quality plugs, or $150-300 for full 8-packs with iridium tech and coils for your QX80. Factor in tools if you’re DIY-ing, but professional install might add $100-200. Start with your symptoms—misfires mean coils too—and balance cost with durability; cheaper copper plugs wear faster, while iridium lasts 100,000 miles, saving money long-term for frequent haulers.
Final Thoughts
Choosing spark plugs isn’t just about fixing a check engine light; it’s about keeping your Infiniti QX80 responsive and efficient for years. Prioritize fitment verification via Amazon’s tool, and consider your mileage—higher means premium materials. With the right pick, you’ll notice smoother starts and better MPG, making every drive feel like new.
Upgrading your Infiniti QX80’s spark plugs doesn’t have to be overwhelming—our top picks make it simple to restore that luxury ride’s power. Whether you go for the best overall kit or a budget-friendly set, check compatibility and grab one today to get back on the road feeling confident. What’s holding you back? Click through and find the perfect match for your QX80 now.
Sagor Jahan is the founder and author of Automopromo.com, dedicated to delivering insightful tips, reviews, and updates in the automotive and promotional industry. With a passion for innovation and clear guidance, Sagor helps readers make informed decisions and stay ahead in the ever-evolving automotive world.
