Best Spark Plugs For 6.2 LS.: 5 Best Spark Plugs For 6.2 LS Reviewed…

I recently spent some time upgrading my own 6.2 LS engine, and if you drive one of these powerful V8s—whether it’s in a Silverado, Sierra, or Escalade—you know how crucial reliable ignition performance is. Choosing the best spark plugs for the 6.2 LS isn’t just about finding the cheapest option; it’s about maximizing combustion efficiency and ensuring long-term durability. We’ve sifted through the market, testing options from premium Iridium to proven Platinum setups, to give you a hands-on review of what truly works for these modern General Motors truck engines. Let’s dive into the top contenders that will keep your 6.2L running smoothly and powerfully.

IMAGE	PRODUCT NAME	AMAZON LINK
	NGK Iridium IX Spark Plugs Compatible with Chevrolet…	View on Amazon
	NGK # 3186 G-Power Platinum Spark Plugs TR5GP – 8…	View on Amazon
	8Pcs 41-110 Iridium Spark Plugs & M8-48322 10.4mm Silicone…	View on Amazon
	41-110 Iridium Spark Plugs & M8-48322 Spark Plug Wires…	View on Amazon
	41-110 Iridium Spark Plugs and M8-48322 Spark Plug Wires…	View on Amazon

NGK Iridium IX Spark Plugs Compatible with Chevrolet Silverado 1500 5.3L 6.2L V8 2014-2024 (8 Pack)

These Iridium IX plugs from NGK are often the go-to choice for enthusiasts looking for a significant performance upgrade over standard OE plugs, especially in modern 6.2 LS engines. The advanced center and ground electrodes are designed to produce a highly efficient spark, which translates into better power delivery and faster throttle response. If you’re pushing your truck hard, these plugs handle the heat and demand easily, minimizing misfires and promoting exceptionally clean combustion. They’re built for longevity while maintaining peak performance.

Key features that stand out:
* Superior Ignitability: Advanced electrode design provides a sharp, consistent spark focus.
* Reduced Misfires: Optimized combustion efficiency helps maintain a smooth idle and powerful acceleration.
* Extended Durability: The corrosion-resistant materials ensure the spark gap growth is minimized over time.
* Performance Focused: Specifically designed to boost performance in high-demand applications.

Pros:
– Excellent spark efficiency and improved throttle response.
– Outstanding long-term durability, often exceeding 100,000 miles.
– Highly reliable under varied temperature and load conditions.

Cons:
– These are often priced higher than standard platinum options.

Best for: The discerning driver seeking peak performance and maximum longevity for their modern 6.2 LS truck or SUV.

Expert Opinion: NGK’s Iridium IX line is renowned for bridging the gap between race-level performance and street reliability; they offer great ignition stability and handle the higher cylinder pressures of the direct-injected 6.2 L92/L9H/LT engines remarkably well.

NGK # 3186 G-Power Platinum Spark Plugs TR5GP – 8 PCSNEW

If you’re looking for a highly reliable plug that offers excellent quality without the premium price tag of Iridium, the NGK G-Power Platinum series is an outstanding choice. Platinum plugs are engineered to operate across a much wider heat range than copper alternatives, making them very versatile for stock or lightly modified 6.2L engines. Their patented triple gasket sealing process is a great feature, completely eliminating the possibility of combustion gas leakage, which is crucial for maintaining cylinder pressure.

Key features that stand out:
* Cost-Effective Durability: Platinum core offers a great lifespan without the Iridium expense.
* Wide Heat Range: Highly resistant to both carbon buildup (cold starts) and pre-ignition (heavy load).
* Triple Gasket Seal: Provides excellent protection against gas leakage and thermal cycling.
* Dependable Ignition: Reliable spark delivery suitable for factory maintenance intervals.

Pros:
– Exceptional value and highly effective ignition for stock applications.
– Proven design minimizes carbon fouling.
– Reliable NGK quality and build construction.

Cons:
– Lifespan isn’t quite as long as the Iridium IX series under extreme conditions.

Best for: Budget-conscious owners prioritizing factory-level durability and routine maintenance adherence in their 6.2 LS.

8Pcs 41-110 Iridium Spark Plugs & M8-48322 10.4mm Silicone Spark Plug Wires Compatible with Chevy Silverado Suburban Tahoe, GMC Envoy Sierra Savana Yukon, Cadillac, Hummer, 5.3L 6.0L 6.2L V8 LS Truck

This comprehensive kit offers fantastic value by pairing the essential 41-110 Iridium plugs (a common OEM replacement number) with heavy-duty 10.4mm silicone spark plug wires. For anyone doing a full tune-up on their 6.2 LS truck, having both components ensures you eliminate potential weak points in the ignition system. The enhanced Iridium core guarantees improved fuel efficiency and more reliable starts, especially in tough weather conditions, while the thick plug wires ensure maximum voltage transfer.

Key features that stand out:
* Complete Tune-Up Kit: Includes both 8 plugs and 8 high-quality silicone wires.
* Enhanced Ignition Performance: Finer Iridium electrode promotes superior combustion.
* Long-Lasting Materials: Built to offer a prolonged lifespan, reducing replacement frequency.
* OE Seamless Replacement: Designed to replace original equipment with a precise fit.

Pros:
– Excellent all-in-one value for a full V8 tune-up.
– Thick 10.4mm silicone wires offer superior voltage protection.
– Iridium core provides performance and fuel combustion benefits.

Cons:
– The quality of the included wires can sometimes be inconsistent compared to high-end branded sets.

Best for: DIY mechanics performing a complete ignition system refresh on a 6.2 LS who need reliable wires and plugs in one box.

41-110 Iridium Spark Plugs & M8-48322 Spark Plug Wires for 5.3 6.0L 6.2L Chev-y GM-C Silve-rado Subu-rban Avalan-che Cadi-llac Escal-ade Yu-kon Sierra V8 LS Truck Red (Pack of 8)

Very similar to the previous product, this kit also provides the highly durable 41-110 Iridium plugs along with the M8-48322 wires, packaged here with bold red wiring for a bit of visual flair under the hood. The core benefit of this kit is the direct replacement capability; the plugs and wires cross-reference perfectly with several OEM part numbers, making selection worry-free for a wide range of 6.2L and related LS truck engines. The wires ensure that the high-voltage spark gets where it needs to be without leakage or degradation.

Key features that stand out:
* OEM Cross-Reference: Plugs and wires match multiple factory replacement numbers (e.g., 12621258).
* Aesthetic Appeal: Red wires add a touch of color to the engine bay.
* Broad Compatibility: Fits numerous models including HD trucks and performance SUVs.
* Reliable Performance: Iridium tips provide consistent spark energy delivery.

Pros:
– Guaranteed fitment across a massive range of 6.2 LS applications.
– Iridium tips are essential for maintaining performance in these modern engines.
– Wires are robust and minimize electrical interference.

Cons:
– If you only need plugs, buying the whole kit might be overkill.

Best for: Owners of older 6.2L trucks or SUVs needing reliable, visually identifiable replacement components that match OE specifications.

41-110 Iridium Spark Plugs and M8-48322 Spark Plug Wires Compatible with Chevy Silverado Suburban Avalanche Express GMC Cadillac Escalade Yukon Sierra Savana 5.3 6.0L 6.2L V8 LS Truck MCCKLE (8 Set)

This final kit focuses heavily on providing a seamless compatibility solution for the entire LS truck platform, including the 6.2L V8. Just like the others, it packages 8 Iridium 41-110 plugs with the corresponding 8MM wires. What sets this apart is the detailed list of specific vehicle compatibility, giving buyers confidence that this set will work from the earliest 6.2L models (like the 2007 Escalade) right up through the later generations. The 8MM wires are a robust upgrade over potentially worn-out factory wires, ensuring your new Iridium plugs can perform optimally.

Key features that stand out:
* Extensive Vehicle List: Provides maximum compatibility assurance across the entire 6.2 LS platform.
* 8MM Wire Quality: Robust wires included for reliable voltage delivery and longevity.
* OEM Replacement Numbers: Plug and wire numbers are confirmed replacements for factory parts.
* Iridium Longevity: Plugs designed for extended service intervals typical of Iridium.

Pros:
– Great confidence in fitment for older and newer 6.2L platforms.
– Complete set minimizes installation time and effort.
– Plugs and wires are performance matched for the application.

Cons:
– Since it’s a generic replacement, extreme performance tuning might require a colder plug.

Best for: Anyone servicing a fleet of GM 6.2L vehicles or a used truck where the exact history of the ignition components is unknown.

Comparison and Short Insights

When choosing the best spark plugs for your 6.2 LS, you’re really deciding between pure performance and overall value.

The NGK Iridium IX (LTR5IX11) is the clear winner for maximum performance and longest life. If your 6.2L is modified with a cold air intake, tune, or headers, the precise and stable spark offered by the IX line is highly beneficial. These plugs are built for true ignition stability.

Conversely, the NGK G-Power Platinum (TR5GP) provides exceptional reliability at a more accessible price point. While they won’t last quite as long as Iridium in extreme conditions, they are far superior to copper plugs and offer great protection against fouling, making them a fantastic choice for standard maintenance and daily drivers.

The three full kits (Products 3, 4, and 5) all offer the Iridium 41-110 plug combined with new plug wires. These kits are the best value proposition if your current spark plug wires are old or degraded. Remember, even the best plug can’t perform if the wire transferring the electricity is failing. If you plan to replace your plugs, you should seriously consider replacing your spark plug wires simultaneously for peak 6.2 LS efficiency.

Final Verdict

If you’re running a 6.2 LS, you want power, efficiency, and reliability—not compromises.

Our Pick for Pure Performance & Longevity: Go with the NGK Iridium IX plugs. They provide the absolute best spark stability and electrode wear characteristics, ensuring your truck maintains peak horsepower for well over 100,000 miles.

Our Pick for Best Value Tune-Up: If you need to replace both plugs and wires, the Iridium 41-110 Plug Kits (like those from Products 3, 4, or 5) offer unmatched convenience and cost savings, immediately addressing two major potential failure points in the ignition system.

Our Pick for Stock Reliability: For simple, high-quality, and cost-effective maintenance, the NGK G-Power Platinum plugs are an excellent, tried-and-true option that will keep your 6.2L running smoothly within factory parameters.

Best Spark Plugs For 6.2 LS. Frequently Asked Questions

Q: What is the recommended change interval for spark plugs in the 6.2 LS?

A: For modern 6.2 LS engines (like the L86 or L92), which typically use Iridium plugs from the factory, the recommended change interval is usually around 90,000 to 100,000 miles. However, if you are running modified tunes or frequently tow heavy loads, inspecting or replacing them slightly earlier (around 70,000 miles) can ensure optimal 6.2 LS performance.

Q: What heat range spark plug should I use in my 6.2 LS if I have engine modifications?

A: The stock heat range is generally adequate for mild modifications (like cold air intakes or cat-back exhausts). However, if you add forced induction (supercharger) or aggressive tuning, you will need a colder plug. A colder plug transfers heat away from the tip faster, preventing pre-ignition. Consult your tuner for specific recommendations, but often going one or two steps colder than stock is necessary.

Q: Do I need to gap these spark plugs myself, or are they pre-gapped?

A: Most premium Iridium spark plugs, including the NGK IX series, come pre-gapped from the factory for common LS applications. However, it is essential practice to always double-check the gap against your vehicle’s specifications before installation. The 6.2 LS spark plug gap often falls around 0.040″ or 0.043″, but verify the exact spec for your engine year.

Q: Why do the Iridium spark plug kits often include new wires?

A: Spark plug wires (or coils/boots) degrade over time due to heat cycling and exposure to engine elements. Since modern Iridium plugs last so long, it makes sense to replace the spark plug wires simultaneously to ensure maximum voltage delivery. Old, resistant wires can cause misfires even with brand new plugs.

Q: Will installing performance spark plugs improve my fuel economy?

A: While new spark plugs will not drastically increase your miles per gallon, switching from old, fouled plugs to new Iridium or Platinum plugs will restore lost efficiency. A more complete and consistent burn (better combustion efficiency) ensures that fuel is used effectively, resulting in smoother running and better economy than a vehicle with failing ignition components.

Q: Are Platinum spark plugs acceptable for the 6.2 LS, or should I only use Iridium?

A: Platinum plugs, such as the NGK G-Power line, are perfectly acceptable and offer great long-term reliability for stock 6.2 LS engines. While Iridium offers a slightly sharper spark and greater durability under extreme heat, Platinum is a cost-effective choice that meets or exceeds the reliability requirements for standard driving and maintenance schedules.