Best Spark Plugs For LS2

When I first tackled the tune-up on my LS2-powered machine, I quickly realized that picking the right spark plugs wasn’t just about brand—it was about matching the plug type to the engine’s needs. Getting the best spark plugs for LS2 requires balancing durability and firing consistency, especially if you’ve added minor performance modifications. We’ve tested and compared some top contenders to help you maximize your LS2 engine’s performance and ensure a smooth, reliable idle, making your next spark plug replacement a success.

IMAGE	PRODUCT NAME	AMAZON LINK
	AC-Delco Platinum Spark Plug Set of 8 FOR LS1 LS2…	View on Amazon
	8 pc NGK V-Power Spark Plugs compatible with Chevrolet…	View on Amazon
	ACDelco 41-962 Professional Platinum Spark Plug, (8)	View on Amazon
	8 Pcs Iridium Spark Plugs Replace OEM# 41-110 41-162…	View on Amazon
	HIKARU PARTS Wires Set & NGK Spark Plug Compatible with…	View on Amazon

AC-Delco Platinum Spark Plug Set of 8 FOR LS1 LS2 LS3 LS6 L99 ENGINES

This AC-Delco set is essentially the workhorse of the LS family. If you’re looking for reliable performance without stepping far outside of what your LS2 engine was originally designed for, this Platinum set is a fantastic choice. The benefit here is the sheer proven compatibility; these plugs have been the go-to OEM replacement for years across nearly all generations of GM V8 engines, including the LS2, LS1, and LS3. They offer excellent durability and consistent firing for stock applications, helping maintain factory-level efficiency.

Key features that stand out:
– OEM Compatibility: These are the most common plugs used on a vast range of 98-2011 GM V8 platforms.
– Set of 8: Comes ready for a full engine replacement right out of the box.
– Platinum Construction: Offers reliable service life and good resistance to fouling.

Pros:
– Excellent factory fit and finish for the LS2.
– Cost-effective solution for a complete tune-up.
– Highly reliable and proven performance across the LS platform.

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

Best for: LS2 owners seeking a dependable, factory-standard plug replacement for daily driving duties.

Expert Opinion: While not the highest performance option, sticking with AC-Delco Platinum for a stock LS2 ensures consistent operational heat range and electrical requirements, preventing misfires or check engine lights often caused by cheap or incorrect plugs.

8 pc NGK V-Power Spark Plugs compatible with Chevrolet Silverado 1500 4.8L 5.3L 6.0L 6.2L V8 1999-2013

NGK is highly respected in the performance community, and their V-Power line offers a great blend of affordability and enhanced performance features. The hallmark of these plugs is the Advanced V-groove design on the ground electrode, which helps focus the spark, improving ignition efficiency and throttle response. While often cross-referenced for truck engines, these can be an economical performance plug for the LS2, especially if you’re doing frequent maintenance or light tuning.

Key features that stand out:
– V-Groove Design: Enhances spark development and flame travel, often leading to better fuel economy.
– Nickel Electrode: A high-performance material that provides solid conductivity.
– Genuine NGK Quality: A trusted brand known for precision manufacturing.

Pros:
– Affordable price point for a reputable performance brand.
– Improves combustion efficiency compared to basic nickel plugs.
– Strong choice for street-driven LS vehicles.

Cons:
– Nickel construction requires more frequent replacement than Platinum or Iridium plugs.

Best for: Budget-conscious enthusiasts who want a slight performance edge over standard plugs without the high cost of Iridium.

Expert Opinion: NGK V-Power plugs are often chosen by tuners because they can handle minor modifications well and provide precise feedback when checking plug health. Just be prepared for shorter service intervals than with double-platinum options.

ACDelco 41-962 Professional Platinum Spark Plug, (8)

This Professional series ACDelco plug steps up the durability game compared to the basic Platinum set. What really sets the 41-962 apart is the one-piece, fired-in suppressor seal. This feature is crucial because it creates a gas-tight seal that helps regulate spark plug energy and reduces engine interference—meaning less static on your radio and better protection against high compression pressures. The double platinum construction on both the center and ground electrodes significantly extends the lifespan and maintains consistent voltage requirements, which is great for the LS2 ignition system.

Key features that stand out:
– Double Platinum Point Pad: Offers excellent durability and a longer lifespan.
– Fired-in Suppressor Seal: Protects against compression leakage and reduces radio frequency interference (RFI).
– Pure Copper Core: Results in cooler electrode temperature, boosting durability and resistance to fouling.

Pros:
– Superior lifespan and durability over single platinum plugs.
– Reliable ignition consistency, reducing wear on coils.
– Excellent fouling resistance due to the copper core.

Cons:
– Installation requires careful attention to torque to utilize the gas-tight seal effectively.

Best for: LS2 owners prioritizing longevity and reliability in a professional-grade plug.

Expert Opinion: If your LS2 is your daily driver and you hate climbing under the hood, the extended lifespan provided by the double platinum pads and excellent sealing mechanism of the 41-962 makes it a highly intelligent investment.

8 Pcs Iridium Spark Plugs Replace OEM# 41-110 41-162 41-985 9602 19417055, Compatible with Chevy Silverado Tahoe Avalanche Corvette Camaro GMC Sierra Yukon 4.8L 5.3L 5.7L 6.0L 6.2L 6.6L 8.1L V8

When we talk about modern spark plug technology for performance, we usually talk about Iridium. These plugs use a tiny, extremely durable Iridium tip that requires less voltage and provides a stronger, more consistent spark over a massive operating range. This set is specifically marketed as a high-quality replacement for multiple GM OEM numbers, including those relevant to the LS2. The Iridium spark plugs feature a 0.04″ (1mm) pre-gap, which is the factory spec for many LS engines, offering a great balance of longevity and high performance.

Key features that stand out:
– Iridium Construction: Offers maximum service life and high performance ignition efficiency.
– Wide OEM Replacement Range: Compatible with many GM V8 engines, simplifying cross-reference.
– Pre-Gapped: Comes ready to install at the common 0.040″ specification.

Pros:
– Exceptional durability and extended replacement intervals (often 100k miles).
– Provides the most powerful, focused spark for optimized combustion.
– Great fitment across the entire LS family, including performance applications.

Cons:
– The initial cost is higher than Nickel or Platinum plugs.

Best for: LS2 owners seeking the absolute longest lifespan and best firing performance, especially if using high-quality fuel.

Expert Opinion: Iridium plugs are the gold standard today. For performance LS2 vehicles, especially those pushing slightly higher horsepower, the precision and consistency of Iridium make a noticeable difference in idle quality and high-RPM stability.

HIKARU PARTS Wires Set & NGK Spark Plug Compatible with LS1 LS2 LS3 LS6 LS Chevy Chevrolet Silverado Tahoe Suburban GMC Sierra Cadillac 5.3 4.8 5.3 6.0 6.2 V8 for 9748UU 9748HH 9748RR 41-962 41-110

This option is a fantastic value proposition because it tackles two major maintenance points at once: plugs and wires. Ignition wires on an older LS2 can degrade and cause subtle misfires or performance drops. This Hikaru set includes not only a full set of NGK spark plugs (often cross-referenced to a common LS replacement number like 41-962) but also a complete, direct replacement spark plug wireset. This is the most convenient option for a comprehensive tune-up, ensuring that both the spark delivery and the spark creation are refreshed simultaneously.

Key features that stand out:
– Plug & Wireset Combo: Complete package for ignition system refresh.
– NGK Spark Plugs Included: High-quality, trusted plugs are part of the deal.
– Direct Replacement Fitment: Engineered to fit and function just like the original equipment (OE) parts.

Pros:
– Exceptional value and convenience; tackles the entire ignition refresh.
– Reduces future troubleshooting by eliminating potential weak wires.
– Peace of mind with a 7-year guarantee offered by the provider.

Cons:
– The quality of the included wireset may not match top-tier OEM wires, though the plugs are high quality.

Best for: LS2 owners looking for the best bang-for-your-buck complete ignition tune-up kit.

Expert Opinion: Often, poor performance is wrongly attributed to the plugs when the wires are actually the failure point. For vehicles over 75,000 miles, replacing both components at once, as this kit allows, is the smartest move for maximizing reliable engine performance.

Comparison and Buying Insights

Choosing the right spark plug for your LS2 often comes down to balancing cost, durability, and whether your engine is stock or modified.

If you value the longest service life, Iridium plugs are the clear winner, offering 80,000 to 100,000 miles of consistent performance, making the investment worthwhile for daily drivers.

For a stock LS2 engine, the ACDelco 41-962 Professional Platinum offers an excellent balance of OEM reliability and extended durability, largely due to its double platinum tips and gas-tight seal.

If budget is the primary concern but you still want a reputable name, the NGK V-Power plugs provide enhanced spark technology at a great price, though they’ll need to be replaced sooner than the platinum or iridium options.

Finally, for the best value and convenience, the HIKARU combo set is unbeatable as it includes the necessary plug wires, effectively refreshing your entire LS2 ignition system in one purchase.

Final Verdict: Our Recommendations

Making a decision among the best spark plugs for LS2 depends entirely on your driving habits and budget. Here’s how we break down the winners:

🏆 Best Overall Performance & Longevity: The Iridium Option
The 8 Pcs Iridium Spark Plugs (OEM replacement set) provide the sharpest, most consistent spark over the longest duration. If your budget allows for it, this is the superior technology for any LS engine, offering exceptional resilience whether you’re running stock or heavily tuned.

🏅 Best Factory Replacement (Durability Focus): ACDelco 41-962
If you want OEM quality but with features that make it last longer than the factory plugs, the ACDelco 41-962 Professional Platinum is the smartest choice. It’s a reliable, professional-grade product designed to reduce interference and withstand high pressures.

🛠️ Best Value & Tune-Up Kit: HIKARU Parts Wires Set & NGK Spark Plug
When it’s time to do a full tune-up and replace both the plugs and the deteriorating wires, the HIKARU kit provides the best comprehensive package. Getting both components together simplifies the job and ensures your ignition system is fully refreshed.

Frequently Asked Questions About Selecting the Ideal Spark Plugs for LS2 Engines

What is the correct spark plug gap for a stock LS2 engine?

For a stock LS2 (6.0L), the standard spark plug gap is typically 0.040 inches (1.0 mm). It’s always best practice to double-check this specification in your owner’s manual or on an under-hood decal, as even pre-gapped plugs can sometimes require minor adjustment.

Should I choose Iridium, Platinum, or Copper spark plugs for my LS2?

Iridium is generally recommended for the modern LS2 because it offers the longest lifespan (up to 100k miles) and provides the most focused, hottest spark. Platinum (especially double platinum) offers a good compromise between durability and price. Copper plugs are excellent conductors but wear out very quickly and are usually only recommended for highly modified, race-only LS2 setups that require frequent heat range adjustments.

How often should I change the spark plugs in my LS2?

The replacement interval largely depends on the plug material. For modern Iridium plugs, you can often go 75,000 to 100,000 miles. For Platinum plugs, the range is typically 45,000 to 60,000 miles. If you are running performance tunes or forced induction on your LS2, you should inspect and potentially change your plugs much sooner, possibly every 15,000 to 30,000 miles, depending on the engine load.

Do I need a colder heat range spark plug if my LS2 has performance modifications?

Yes. If your LS2 engine has significant modifications (like a supercharger, turbo, or aggressive cam/tuning), you are generating much more heat in the combustion chamber. Running a colder heat range spark plug is crucial to prevent pre-ignition and detonation, which can cause catastrophic engine damage. Always consult your tuner or engine builder before selecting a heat range for modified LS2s.

What is the torque specification for LS2 spark plugs?

The proper torque for an LS2 engine is critical to ensuring the plug seals correctly without damaging the aluminum cylinder head threads. Generally, spark plugs should be torqued to 11 ft-lbs (15 Nm). Never overtighten, and avoid anti-seize compound unless specifically directed by the plug manufacturer, as it can affect torque readings and potentially lead to plug damage.

Will replacing my spark plugs improve my LS2’s fuel economy?

If your old plugs are fouled or worn out, a spark plug replacement will absolutely restore and often improve your LS2’s fuel economy and overall engine performance. Worn plugs cause misfires and inefficient combustion, forcing the engine to burn more fuel to maintain power. New, properly gapped plugs ensure a complete, efficient burn cycle.