Finding the best spark plugs for 370Z can transform the driving experience, restoring crisp throttle response, smooth idling, and dependable starts. The VQ37VHR engine is sensitive to ignition components, and the right plugs make a noticeable difference in everyday drivability and performance.
Whether you are performing routine maintenance or chasing performance gains, the correct spark plug ensures your Z runs at its peak. Many experienced owners and mechanics agree that NGK and Denso are the go-to brands for Nissan VQ engines, with forum discussions highlighting that Zs “love” NGK plugs and often throw check engine lights with other brands. The factory gap specification for most 370Z applications is 0.043 inches (1.1mm), and selecting the right heat range is crucial for your engine’s health and longevity.
The VQ37VHR responds well to both factory-spec and performance-oriented plugs. For stock or lightly modified engines, iridium plugs from NGK and Denso provide exceptional durability, often lasting over 100,000 miles. For forced induction or high-compression builds, a colder heat range plug is essential to prevent pre-ignition and detonation.
Whether you need a reliable OEM replacement or a race-ready upgrade, these seven selections represent the best options for your 370Z. Here are the best spark plugs for 370Z to keep your engine firing strong.
7 Best Spark Plugs For 370Z
| Image | Title | Best For | Link |
|---|---|---|---|
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A-Premium Ignition Coil Spark Plug Kit | All-in-one maintenance solution for 370Z engines. | View on Amazon |
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OverstockDirect NGK Laser Iridium Spark Plugs | The gold standard for OEM reliability and performance. | View on Amazon |
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A-Premium Double Iridium Spark Plugs | Great value for budget-conscious car enthusiasts. | View on Amazon |
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Premium Double Iridium Spark Plug Set | Durable replacement for high-mileage daily drivers. | View on Amazon |
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Dragon Fire Performance Ignition Coil Kit | Boosting ignition power for improved throttle response. | View on Amazon |
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NGK Laser Iridium Spark Plugs | Perfect fit for earlier 370Z model years. | View on Amazon |
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UF617 Ignition Coil Spark Plug Kit | Comprehensive kit to fix misfires and power loss. | View on Amazon |
Our Top 7 Best Spark Plugs For 370Z Reviews – Expert Tested & Recommended
1. A-Premium Ignition Coil and Double Iridium Spark Plug Kit
If you are looking to refresh your entire ignition system at once, this kit is an incredible convenience. It includes both the high-quality ignition coils and the double iridium spark plugs you need to restore your 370Z’s performance to factory fresh standards.
Key Features That Stand Out
- ✓ Includes matching ignition coils and double iridium plugs.
- ✓ Designed specifically for Nissan 3.7L engines.
- ✓ Excellent durability for long-term reliability.
- ✓ Bolt-on installation saves time and labor.
Why We Recommend It
Replacing both coils and plugs simultaneously is the best way to eliminate common misfire issues in the 370Z. This kit offers a balanced blend of quality and price that makes maintenance hassle-free.
Best For
Owners who want a complete, reliable ignition overhaul for their daily-driven 370Z.
Pros and Cons at a Glance
2. OverstockDirect NGK Laser Iridium Spark Plugs
If you want exactly what came in your 370Z from the factory, these NGK Laser Iridium plugs are the right choice. They are widely considered the gold standard for performance, offering excellent ignition consistency and longevity.
Key Features That Stand Out
- ✓ Genuine OEM quality and performance.
- ✓ Laser-welded iridium tip for enhanced durability.
- ✓ Trivalent metal plating prevents corrosion.
- ✓ Maintains stable idle and acceleration.
Why We Recommend It
NGK is a world-leader in ignition technology, and these plugs are engineered specifically to handle the high heat and performance demands of your Nissan engine.
Best For
The purist owner who wants factory-grade reliability and performance.
Pros and Cons at a Glance
3. A-Premium Double Iridium Spark Plug Set
Need to save money without sacrificing the performance benefits of iridium? This set from A-Premium is an excellent value option that gives you the core benefits of iridium construction at a lower price point.
Key Features That Stand Out
- ✓ Double iridium construction for improved longevity.
- ✓ Pre-gapped to 0.044 inches for easy installation.
- ✓ Highly resistant to heat and electrical erosion.
- ✓ Excellent cost-to-performance ratio.
Why We Recommend It
Maintaining a high-performance engine like the 3.7L V6 can get expensive. This plug set is the perfect way to keep your maintenance costs down while still using high-quality materials.
Best For
Budget-conscious Z owners who still prioritize high-performance parts.
Pros and Cons at a Glance
4. Premium Double Iridium Spark Plug 6-Piece Replacement Set
This 6-piece set is specifically designed to fit the 3.7L engine found in many Nissan and Infiniti vehicles. If you have been noticing rough idling or a slight decrease in fuel economy, this set is a reliable fix.
Key Features That Stand Out
- ✓ Superior resistance to heat and corrosion.
- ✓ Designed to be more wear-resistant than copper-nickel.
- ✓ Consistent spark delivery for smoother running.
- ✓ Convenient 6-pack for a full engine tune-up.
Why We Recommend It
We like this set because of its material durability. Double iridium construction ensures that the electrode remains sharp and efficient for a long time, leading to fewer maintenance intervals.
Best For
Owners looking to improve engine longevity on high-mileage vehicles.
Pros and Cons at a Glance
5. Dragon Fire Performance Ignition Coil and Iridium Spark Plug Kit
If you’re looking for a slight performance edge, Dragon Fire is known for its high-output ignition components. This kit provides more ignition power than stock components, which can help ensure a more complete fuel burn.
Key Features That Stand Out
- ✓ Claims to offer up to 15% more ignition power.
- ✓ Built with OEM-grade durability in mind.
- ✓ Direct “plug and play” replacement.
- ✓ Perfect for engines with minor performance modifications.
Why We Recommend It
The extra spark energy can lead to smoother throttle response and a more lively engine feel. It’s a great upgrade if you’re already doing maintenance and want to add a bit of “pep” to the step of your Z.
Best For
Enthusiasts who want a performance-oriented upgrade over factory parts.
Pros and Cons at a Glance
6. NGK Laser Iridium Spark Plugs 6-Piece Set
Another excellent set from NGK, specifically tailored for the 2009-2010 370Z models. If you have an earlier year model, this pack ensures that you get the correct heat range and fitment for your engine.
Key Features That Stand Out
- ✓ Genuine NGK laser iridium quality.
- ✓ Optimized for 2009-2010 3.7L V6 engines.
- ✓ Includes all required hardware for installation.
- ✓ Excellent reputation for reliability.
Why We Recommend It
Sometimes you just want to stick with what works, and for early 370Z models, these plugs are exactly what the manual recommends for peak performance.
Best For
Owners of early 370Z model years looking for guaranteed compatibility.
Pros and Cons at a Glance
7. UF617 Ignition Coil and Double Iridium Spark Plug Performance Kit
Last on our list is another comprehensive kit that includes UF617-style ignition coils and double iridium spark plugs. This is a great “one and done” repair kit for anyone experiencing engine hesitation.
Key Features That Stand Out
- ✓ Comprehensive kit includes coils and plugs.
- ✓ Double iridium plugs rated for long life.
- ✓ Addresses common misfire and idle issues.
- ✓ Cost-effective way to restore engine performance.
Why We Recommend It
If your Z has high miles and you have never changed the coils or plugs, this kit provides everything you need to make the car feel new again without buying parts individually.
Best For
Owners of aging 370Zs who want a quick, comprehensive repair.
Pros and Cons at a Glance
Complete Buying Guide for Best Spark Plugs For 370Z
Essential Factors We Consider
When selecting spark plugs for the Nissan 370Z, the most important factor is the material. Iridium is the industry standard for this engine because of its extreme melting point and durability. Always look for “double iridium” or “laser iridium” branding, as these offer the longest service life and most consistent spark. Compatibility is also crucial; even though many 3.7L engines look similar, it is vital to check your specific model year and engine code to ensure the plug reach and heat range are correct for your Z.
Budget Planning
Spark plugs range from affordable options to premium performance kits. If you are doing basic maintenance, a standard 6-pack of quality iridium plugs is very budget-friendly. However, if your ignition coils are also aging, it is often smarter to invest in a full ignition kit. While the upfront cost is higher, you save money in the long run by replacing parts in a single session rather than troubleshooting individual component failures later.
Final Thoughts
The 370Z is an incredible platform, and keeping its ignition system in top shape is the key to enjoying that V6 power. Whether you choose a name-brand option like NGK or a comprehensive kit, you are making a great move for the longevity of your car. Take your time with the installation, torque them to the factory specification, and your Z will thank you with smooth, reliable performance for miles to come.
Frequently Asked Questions
Q: How often should I replace the spark plugs in my 370Z?
A: Most manufacturers recommend checking them every 30,000 to 50,000 miles, but iridium plugs often last up to 100,000 miles. It is best to inspect them if you notice performance drops or rough idling.
Q: Can I install these spark plugs myself?
A: Yes, if you have basic mechanical skills and a set of tools including a torque wrench and a spark plug socket. It involves removing the engine cover and accessing the coil packs on top of each cylinder.
Q: Do I need to gap the plugs before installing them?
A: Most modern iridium plugs come pre-gapped, but it is always good practice to check the gap against the factory specification in your owner’s manual before installing them.