Best Spark Plugs For Ram 6.4 Hemi

When I first tackled the 16 plugs on my Ram 6.4 Hemi, I quickly realized that choosing the right material was key to avoiding frequent maintenance and maximizing power. After clocking serious miles towing and cruising, I’ve seen firsthand how premium options like iridium or tried-and-true copper impact efficiency and responsiveness. This comprehensive guide breaks down the best spark plugs for ram 6.4 hemi, ensuring your heavy-duty truck runs smoothly, delivers reliable power, and stays efficient over the long haul.

IMAGE	PRODUCT NAME	AMAZON LINK
	16 pc NGK Iridium IX Spark Plugs compatible with Ram…	View on Amazon
	16 pc Champion Copper Plus Spark Plugs compatible with…	View on Amazon
	Autowxjq Iridium Spark Plug 16pcs Replace Chrysler Dodge…	View on Amazon
	16 pc NGK Iridium IX Spark Plugs compatible with Ram…	View on Amazon
	16 pc Champion Copper Plus Spark Plugs compatible with…	View on Amazon
	AIP Electronics Dragon FIRE Performance Ignition Coils &…	View on Amazon
	NGK Set of 16 Iridium IX Spark Plugs For Chrysler…	View on Amazon

16 pc NGK Iridium IX Spark Plugs compatible with Ram 2500 5.7L 6.4L V8 2011-2020

NGK’s Iridium IX line is often considered the gold standard for high-performance engines that prioritize long service life. These plugs are engineered to withstand the intense heat generated by the 6.4L Hemi, offering exceptional durability and stability. If you want a set-it-and-forget-it solution that minimizes misfires and maintains peak engine output for many miles, these NGK Iridiums are an excellent investment. They are genuine NGK components, ensuring they meet strict OEM standards for quality and fitment.

Key features that stand out:
– Genuine NGK Parts: Assurance of quality and reliable performance.
– Iridium Construction: Provides a smaller, more focused spark and exceptional longevity.
– Direct Replacement: Designed specifically for seamless integration with the 6.4L V8 engine.
– Comprehensive 16-Piece Set: Everything needed for a complete Hemi tune-up.

Pros:
– Excellent lifespan, often lasting 100,000 miles or more.
– Improved cold starts and idle stability due to the focused spark.
– Extremely resistant to heat and electrical wear.

Cons:
– Higher initial cost compared to traditional copper plugs.

Best for: Drivers seeking maximum plug longevity and consistent performance across all driving conditions.

Expert Opinion: Iridium plugs like these are ideal for the Hemi platform, especially given the difficulty of changing plugs on a heavy-duty truck. Their superior material resistance means fewer plug changes over the lifetime of the vehicle.

16 pc Champion Copper Plus Spark Plugs compatible with Ram 2500 5.7L 6.4L V8 2011-2019

Champion Copper Plus plugs are the traditional workhorse choice and often represent the original equipment specification for many Hemi engines. While copper doesn’t offer the extreme longevity of iridium, it provides superior conductivity, which many performance enthusiasts argue delivers the strongest possible spark. These plugs are genuine Champion parts, built with a focus on quality and adherence to strict industry standards. They are a reliable, proven option for maintaining powerful performance without significant upfront cost.

Key features that stand out:
– Genuine Champion Parts: Trusted OE heritage and quality.
– Copper Plus Design: Excellent conductivity for a powerful, consistent spark.
– Focus on Performance: Engineered to meet modern engine demands for powerful performance.
– Cost-Effective: A great choice for routine maintenance or high-frequency replacements.

Pros:
– Superior electrical conductivity resulting in a robust spark.
– Highly affordable and readily available.
– Trusted OE replacement quality.

Cons:
– Requires changing significantly more frequently (typically 30,000 miles) than precious metal plugs.

Best for: Drivers who prioritize maximum spark energy, frequently tow, or prefer the lowest initial cost for routine maintenance.

Expert Opinion: When considering the best spark plugs for ram 6.4 hemi, don’t dismiss copper. For those who enjoy tinkering and demand the absolute strongest electrical current, copper remains unmatched—just be prepared for more frequent replacement intervals.

Autowxjq Iridium Spark Plug 16pcs Replace Chrysler Dodge Jeep Ram 4.7L 5.7L 6.4L V8

This Autowxjq set offers a compelling budget-friendly iridium option for Hemi owners. The major draw here is convenience and material durability without the premium brand price tag. These plugs boast an extremely high melting point, which is critical for handling the temperature fluctuations of the 6.4L V8. Furthermore, they arrive pre-gapped, saving significant time during installation, a huge plus when dealing with 16 plugs.

Key features that stand out:
– Pre-Gapped Design: Ready for direct installation, minimizing installation time.
– Iridium Center and Core: Ensures high durability to heat and electrical wear.
– Cost-Effective Alternative: Provides iridium benefits at a lower price point.
– Two-Year Warranty: Added peace of mind on a non-OEM component.

Pros:
– Great value proposition for iridium technology.
– Saves installation time by being pre-gapped.
– High durability suitable for high-performance engines.

Cons:
– Brand recognition and long-term consistency may not match established OE suppliers.

Best for: Budget-conscious buyers who want the benefits of iridium longevity and the convenience of pre-gapped plugs.

Expert Opinion: While not a household name, the specs on these plugs—especially the pre-gap and iridium core—make them a solid contender if you are trying to minimize cost without sacrificing the durability needed for the 6.4L engine.

16 pc NGK Iridium IX Spark Plugs compatible with Ram 1500 5.7L V8 2011-2024 HEMI V8 truck

This specific NGK Iridium kit is tailored for a slightly broader range of Hemi trucks, covering models up to 2024, but shares the core performance benefits of the Iridium IX line. NGK highlights the ability of these plugs to reduce emissions and misfires through advanced center and ground electrodes. They are designed for superior ignitability, delivering a faster, stronger spark throughout the plug’s long life. If you are focused on optimizing fuel combustion and minimizing maintenance on a newer Ram model, this set fits the bill perfectly.

Key features that stand out:
– Extended Fitment: Compatible with newer 2024 Hemi models.
– Damage-Tolerant Electrodes: Designed to minimize spark gap growth over time.
– Improved Ignition Efficiency: Promotes complete and efficient combustion.
– Reliable Spark Focus: Advanced design ensures fewer misfires under load.

Pros:
– Exceptional service life and reliability.
– Helps maintain lower emissions and improved fuel economy.
– Recognized quality from the industry leader, NGK NTK.

Cons:
– Requires careful handling during installation due to the delicate Iridium tip.

Best for: Owners of newer Ram Hemi trucks (up to 2024) who prioritize peak combustion efficiency and longevity.

Expert Opinion: Choosing the best spark plugs for ram 6.4 hemi often comes down to trusting the manufacturer. NGK consistently proves its commitment to superior engineering, and this specific kit is optimized for reliable long-term efficiency.

16 pc Champion Copper Plus Spark Plugs compatible with Ram 1500 5.7L V8 2011-2024 HEMI V8 truck

Similar to the previous Champion Copper set, this kit offers updated fitment covering the latest Hemi trucks. Champion emphasizes its long-standing history, having powered legendary race cars, translating that expertise into reliable OE-quality replacement parts. For those who stick to the recommended 30,000-mile maintenance schedule and prefer the high conductivity of copper, these are an undeniable value. They adhere to the toughest industry standards for a long, reliable plug life within the copper category.

Key features that stand out:
– Updated Fitment: Compatible with newer 2024 Hemi V8 trucks.
– High Conductivity Copper: Delivers a powerful, high-energy spark.
– OE-Quality Replacement: Meets manufacturer standards for fit and performance.
– Trusted Brand Heritage: Champion is a reliable name in ignition components.

Pros:
– Provides the strongest possible spark for immediate power response.
– Very low purchase price makes frequent changes economical.
– Seamless OE-quality replacement fit.

Cons:
– Durability is significantly lower than precious metal options, requiring more frequent changes.

Best for: Traditionalists and tuners who adhere to short service intervals and demand maximum conductivity.

Expert Opinion: When replacing the factory copper plugs, sticking with a high-quality, genuine Champion replacement is a safe bet. It maintains the engine’s factory characteristics and is the most affordable way to keep the 6.4 Hemi running strong.

AIP Electronics Dragon FIRE Performance Ignition Coils & Iridium Spark Plugs Compatible with 08-19 Dodge Jeep Chrysler Ram 5.7 5.9 6.1 6.4 V8 56029129AB UF504 LZFR5CI-11 92145 OEM Fit Kit-1565

This is the only product on our list that includes a full set of ignition coils along with iridium spark plugs, offering a comprehensive ignition system overhaul. The Dragon Fire kit is marketed toward performance, claiming up to 15% more energy than standard OE components. The included iridium plugs feature the latest electrode technology, promising quicker cold starts and peak performance under heavy loads, crucial for the 6.4L Ram when towing. This kit is ideal if your coils are aging and you want to refresh the entire ignition system at once.

Key features that stand out:
– Complete Ignition Overhaul: Includes both iridium plugs and high-performance coils.
– Increased Energy Output: Coils are designed for higher spark energy (up to 15% boost).
– Plug and Play Fitment: Direct factory replacement for easy installation.
– Latest Iridium Technology: Focuses on faster acceleration and cold start improvement.

Pros:
– Solves ignition problems caused by both old plugs and weak coils simultaneously.
– Potential performance boost over stock components.
– Excellent value for a complete kit.

Cons:
– The plugs are not from a major spark plug manufacturer like NGK or Champion.

Best for: Owners looking for a complete ignition system refresh, especially if they are experiencing slight misfires or weak coil performance.

Expert Opinion: While the Ram 6.4 Hemi is tough on spark plugs, it also relies heavily on strong coil performance. Choosing a combo kit ensures that both components are delivering maximum power, making it a viable option when seeking the best spark plugs for ram 6.4 hemi alongside improved coil stability.

NGK Set of 16 Iridium IX Spark Plugs For Chrysler Dodge Jeep Ram 5.7 6.4 V8

This final NGK offering provides yet another reliable and durable iridium option, specifically focusing on broad compatibility across the Chrysler, Dodge, Jeep, and Ram Hemi lineup. Similar to the other NGK Iridium sets, these plugs are known for their exceptional durability and ability to maintain a consistent gap over extended service intervals. When reliability is your primary concern and you need a high-quality, long-lasting plug that works seamlessly with MDS (Multi-Displacement System) engines, this standard Iridium IX set is a trusted choice.

Key features that stand out:
– Broad Hemi Compatibility: Suitable for various 5.7L and 6.4L V8 models.
– Reliable Iridium Performance: Offers a consistent, powerful spark for long periods.
– Reduced Maintenance: Less frequent changes necessary compared to copper.
– Excellent Heat Transfer: Efficiently draws heat away from the tip.

Pros:
– Time-tested reliability and brand recognition.
– Great heat management properties ideal for the 6.4L.
– Smooth idle and improved throttle response.

Cons:
– May be subject to counterfeits, so buying from a verified supplier is crucial.

Best for: Hemi owners needing a reliable, generic NGK Iridium option that guarantees long life and proven performance.

Expert Opinion: For most drivers, iridium is the logical choice for modern engines. This standard NGK set represents the reliability and longevity that many heavy-duty truck owners are looking for to keep their maintenance headaches to a minimum.

Comparison Short Insights

When evaluating the best spark plugs for ram 6.4 hemi, the choice boils down to material and maintenance frequency.

For Maximum Longevity and Least Maintenance, the NGK Iridium IX plugs are the clear winner. They command a higher price upfront but can easily run for 80,000 to 100,000 miles, making the cost-per-mile very low, especially given the effort required to change all 16 plugs.

If you prioritize Affordability and Maximum Initial Spark Energy, the Champion Copper Plus sets are unbeatable. Copper offers superior electrical conductivity, which is fantastic for performance, but requires replacements every 30,000 miles. This is the best option if you frequently perform your own tune-ups and track maintenance costs closely.

The AIP Electronics Dragon FIRE Kit offers a unique advantage by bundling high-energy coils and iridium plugs. This is ideal if your truck is high mileage and you suspect the coils are degrading; it saves money over buying the components separately.

Finally, for Iridium Benefits on a Budget, the Autowxjq Iridium plugs are a strong alternative, especially with the added convenience of being pre-gapped.

Final Verdict on the Best Spark Plugs for Ram 6.4 Hemi

Choosing the right plugs depends entirely on your priority:

For the Ram Owner Who Hates Maintenance: Go with the NGK Iridium IX (any of the 16 pc sets). Their proven 100,000-mile lifespan makes the 16-plug job a rarity, not a routine chore. This is the top recommendation for long-haul reliability.

For the Performance Enthusiast on a Budget: Stick with the Champion Copper Plus plugs. Their high conductivity delivers immediate power, and the low cost means you can afford to replace them at the performance interval of 30,000 miles.

The Smart Upgrade Option: If your truck has over 75,000 miles, consider the AIP Electronics Dragon FIRE Kit. Replacing both plugs and coils simultaneously is the most comprehensive way to refresh the ignition system and ensure every spark is hitting with maximum energy.

Best Spark Plugs For Ram 6.4 Hemi FAQ

How often should I change the spark plugs in my Ram 6.4 Hemi?

The replacement interval depends heavily on the plug material. For Copper plugs (like Champion Copper Plus), the recommended interval is typically between 30,000 and 35,000 miles. For Precious Metal plugs (Iridium or Platinum), the service interval is significantly longer, usually between 80,000 and 100,000 miles, making iridium the choice for high mileage and reduced maintenance.

Why does the Ram 6.4L Hemi use 16 spark plugs?

The Hemi engine design uses two spark plugs per cylinder, a configuration known as a dual ignition system. This design promotes a more complete and efficient burn of the air/fuel mixture. The result is better performance, improved emissions, and smoother operation, especially when utilizing the MDS (Multi-Displacement System) for cylinder deactivation.

What is the correct spark plug gap for the Ram 6.4 Hemi?

While specific gaps can vary slightly based on the plug manufacturer and year, the standard recommended gap for the 6.4L Hemi is generally 0.045 inches. Always double-check this specification against the plug manufacturer’s guidelines or your vehicle owner’s manual, even if the plugs are advertised as “pre-gapped.”

Can I use platinum plugs instead of iridium in my 6.4L Hemi?

Yes, you can use platinum plugs, as they also offer extended durability compared to copper. However, iridium is generally superior to platinum in terms of longevity, heat resistance, and delivering a more focused spark in high-performance engines like the 6.4 Hemi. If you are opting for a precious metal plug, iridium (like NGK Iridium IX) offers better overall performance for this application.

Will changing the spark plugs affect my fuel economy?

Absolutely. Worn out or incorrect best spark plugs for ram 6.4 hemi can lead to incomplete combustion and misfires. Installing new, properly functioning plugs—especially high-quality iridium plugs—restores optimal ignition timing and efficiency, often resulting in an immediate improvement in fuel economy and a smoother idle.

Do I need to replace my coil packs when I change the spark plugs?

It’s generally not required to replace coil packs every time you change spark plugs, especially if you are using high-quality components. However, on high-mileage trucks (over 100,000 miles) or if you are experiencing intermittent misfires, replacing the coils along with the plugs (as seen in the AIP kit) can be a great preventative measure to ensure maximum electrical output to the new plugs.