Best Spark Plugs for 5.7 L Hemi

When it comes to maintaining that powerful Hemi growl, the little things matter most. I’ve spent a lot of time digging into the specifics of what truly makes a difference in ignition performance, especially for those notorious 16-plug 5.7L engines. Choosing the Best Spark Plugs For 5.7 L Hemi isn’t just about grabbing the cheapest set; it’s about balancing longevity, power, and efficiency. This guide covers ten top options, from tried-and-true copper to modern iridium setups, helping you dial in your truck’s or car’s performance.

IMAGE	PRODUCT NAME	AMAZON LINK
	16 pc Champion Copper Plus Spark Plugs compatible with…	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
	Ignition Coil Pack Spark Plugs fit for 5.7 Hemi Dodge…	View on Amazon
	8x Ignition Coil Pack and 16x Iridium Spark Plugs Fit…	View on Amazon
	16 pc Autolite Platinum Spark Plugs compatible with Ram…	View on Amazon
	16 pc Champion Iridium Spark Plugs compatible with Ram…	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 NGK Standard Spark Plugs compatible with Ram 1500…	View on Amazon

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

For those looking to stick closest to the factory original feel and performance, these Champion Copper Plus plugs are an excellent choice. Copper provides superior conductivity, which is why the Hemi factory tune relies on them. This 16-piece kit is designed specifically for the dual-plug system in later model Ram 1500s, delivering a hot, reliable spark that helps the Hemi perform optimally right off the bat. If you plan on replacing your plugs every 30,000 miles, this copper option provides fantastic value.

Key features that stand out:
– Genuine Champion Parts: Ensures OE-quality fitment and reliability.
– Copper Core: Provides maximum electrical conductivity for a strong initial spark.
– Improved Performance: Designed to meet modern engine demands for powerful performance.

Pros:
– Best conductivity for maximum power delivery.
– Excellent value for a complete 16-plug kit.
– Factory specification for many 5.7L Hemis.

Cons:
– Requires replacement much sooner (around 30k miles) compared to iridium options.

Best for: Hemi owners who prioritize peak performance and are committed to frequent maintenance intervals.

Expert Opinion: Copper is the standard for a reason. While they wear quicker, the immediate power delivery and consistent ignition performance make these Champions a staple choice for maintaining OE specs.

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

NGK Iridium IX plugs are the go-to upgrade when you want premium longevity without sacrificing ignition quality. These plugs use an extremely fine Iridium tip, which requires less voltage to fire and maintains a precise gap much longer than traditional copper or platinum. For the 5.7L Hemi, this translates into fewer misfires, particularly under load, and a significant boost in durability, often allowing replacement intervals exceeding 60,000 miles.

Key features that stand out:
– Iridium IX Construction: Features an extremely durable and fine Iridium tip for precise spark delivery.
– Reduced Emissions and Misfires: Promotes sharper spark focus for efficient combustion.
– Longer Service Life: Damage-tolerant electrodes minimize spark gap growth over time.

Pros:
– Exceptional longevity and durability.
– Improves ignition and spark efficiency over copper as they age.
– Excellent reputation for high-performance engines.

Cons:
– Higher initial cost per plug than the copper alternative.

Best for: Daily drivers and commuters who want a durable, long-lasting plug set that minimizes future maintenance.

Expert Opinion: NGK’s reputation for quality is unmatched. These plugs are a smart investment for Hemi owners seeking extended service intervals and consistent performance throughout the plug’s life.

16 pc Champion Copper Plus Spark Plugs compatible with Dodge Ram 1500 5.7L V8 2003-2008

If you own an early model 5.7L Hemi truck, this specific Champion Copper Plus kit is tailored for your older generation engine. Like the newer model Champion set, these provide the strong, reliable spark that copper is famous for. Using genuine Champion parts ensures you maintain the engine’s original characteristics, which is crucial for maximizing power and fuel economy in the 2003-2008 trucks that may be running different factory engine management systems than current models.

Key features that stand out:
– OE Quality Replacement: Seamless fit and function for specific older Hemi models.
– Proven Copper Design: Delivers reliable performance and strong initial firing capabilities.
– Trusted Brand: Champion has a long history of success in automotive ignition systems.

Pros:
– Ideal OE replacement for first-generation Hemi 5.7L trucks.
– Excellent conductivity for peak performance.
– Cost-effective maintenance solution.

Cons:
– Best performance only lasts for roughly 30,000 miles.

Best for: Owners of 2003-2008 Hemi trucks looking for an authentic, budget-friendly OE replacement plug.

Expert Opinion: When dealing with older engines, sticking close to the original equipment specification often yields the best results, and this specific Champion kit does exactly that for the classic Hemi.

Ignition Coil Pack Spark Plugs fit for 5.7 Hemi Dodge Ram 1500, Chrysler 300, Challenger Charger Durango, Jeep Commander Grand Cherokee, 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

This comprehensive kit solves two problems at once: spark plug replacement and coil pack failure. Designed for 2009-2020 5.7L Hemis (which use 8 coils and 16 plugs), this package provides all 8 ignition coils and the necessary 16 spark plugs. If your vehicle is experiencing engine misfires, rough idling, or decreased power—issues often stemming from failing coils or worn plugs—this combo is a highly economical and convenient solution to refresh the entire ignition system.

Key features that stand out:
– Full Ignition System Refresh: Includes 8 ignition coils and 16 spark plugs.
– OEM Specification: Coils and plugs are designed to meet or exceed OEM specs, solving issues like hard starting and poor fuel economy.
– Wide Compatibility: Fits numerous 5.7L V8 Hemi vehicles across Ram, Dodge, Chrysler, and Jeep platforms.

Pros:
– Excellent value for replacing two critical components simultaneously.
– Direct OEM design ensures easy installation.
– Addresses misfires caused by both plugs and coils.

Cons:
– The quality of aftermarket coils can sometimes be inconsistent compared to brand-name OEM.

Best for: Owners experiencing definite ignition coil failure alongside due spark plug maintenance.

Expert Opinion: Replacing worn-out components at the same time is the best practice for ensuring longevity and maximizing performance. This kit offers substantial savings over buying coils and plugs separately.

8x Ignition Coil Pack and 16x Iridium Spark Plugs Fit for 5.7 V8 HEMI 2009 2010 2011 2012 2013 2014 2015 Dodge Ram 1500 2500 3500 Charger Challenger Durango Jeep Cherokee Commander Chrysler 300 Aspen

Similar to the previous combo, this kit pairs 8 ignition coils with a set of 16 Iridium spark plugs, offering a significant performance and lifespan upgrade compared to kits using standard plugs. The iridium plugs are known for their enhanced durability and precise spark delivery. This package claims to upgrade coil energy by 15% over OE coils, resulting in improved engine performance and better gas mileage after replacing tired factory components.

Key features that stand out:
– Iridium Plug Upgrade: Paired with long-lasting, high-performance Iridium spark plugs.
– Enhanced Coil Performance: Coils are designed to deliver up to 15% more energy than original equipment.
– Complete Kit: Includes all 8 coils and 16 plugs needed for the Hemi 5.7L system.

Pros:
– Combines the convenience of a combo kit with the longevity of iridium plugs.
– Potential performance boost over stock due to enhanced coils.
– Excellent compatibility across many 5.7L Hemi models up to 2019.

Cons:
– Aftermarket kits like this might require a small amount of gap checking before installation.

Best for: Drivers who want to upgrade their entire ignition system to a long-life iridium setup while addressing potential coil issues.

Expert Opinion: If you are tackling a comprehensive tune-up, the benefit of using iridium plugs in a combo package like this outweighs the slightly higher cost, providing years of maintenance-free ignition.

16 pc Autolite Platinum Spark Plugs compatible with Ram 1500 5.7L V8 2011-2024 HEMI

Autolite Platinum plugs sit squarely between the budget-friendly copper and the premium iridium. These plugs feature platinum-to-platinum firing surfaces, which offer improved durability over copper and maintain a precision gap longer. They are designed for easier starts and quicker acceleration due to a necked-down center electrode, which reduces the voltage needed for ignition. This is a reliable middle ground for Hemi owners prioritizing balance between cost and longevity.

Key features that stand out:
– Platinum-to-Platinum Firing: Provides superior durability and extended plug life.
– Yttrium Enhanced Ground Electrode: Improves heat transfer for consistent performance.
– Maximum Performance: Fires quicker and cleaner with less voltage required.

Pros:
– Better longevity than copper plugs (usually 50k+ miles).
– More affordable than high-end iridium options.
– Designed to optimize engine performance and fuel economy.

Cons:
– Platinum typically doesn’t handle extreme heat as well as iridium in high-performance applications.

Best for: Value-conscious owners seeking an excellent balance between durability and price for their daily driven Hemi.

Expert Opinion: Platinum is a major step up in durability from copper. Autolite has been around forever, and this is a solid, trusted replacement that will certainly outperform worn OE plugs.

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

Champion brings its ignition expertise to the Iridium game with this 16-piece set. These plugs are constructed with a fine-wire center electrode and a V-trimmed ground electrode, creating a sharply focused flame kernel. For the Hemi, this design minimizes quenching and misfires, leading to faster, more complete combustion. If you like the brand integrity of Champion but want the extended service life and durability of a premium metal plug, this set delivers on both fronts.

Key features that stand out:
– Precious Metal Iridium: Built to withstand high-pressure environments and high temperatures.
– Fine-Wire Electrode Design: Enhances performance by creating a focused flame kernel.
– Enhanced Performance: Designed for faster combustion and reduced misfires.

Pros:
– Combines Champion’s OE knowledge with long-lasting iridium technology.
– Improves combustion efficiency across the entire rpm range.
– Excellent durability for extended intervals (60k+ miles).

Cons:
– Higher price point compared to Champion’s own Copper Plus line.

Best for: Brand loyalists who want the maximum possible lifespan and performance from a Champion product.

Expert Opinion: The fine-wire design is key here. It guarantees a faster, more robust spark, making these an excellent choice for consistent Hemi power delivery over many miles.

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

This value-focused iridium kit is designed to be a direct, pre-gapped replacement for a wide range of V8 Hemi engines, including the 5.7L. The main advantage here is the convenience and cost savings of getting a full 16-plug set that is ready to install right out of the box. Iridium offers a high melting point, ensuring excellent resistance to heat and electrical wear, making it a reliable, high-durability option for today’s powerful engines.

Key features that stand out:
– Iridium Durability: Extremely high melting point for resistance to heat and wear.
– Pre-gapped: Can be installed directly, saving time during the complicated Hemi plug change.
– Wide Fitment: Compatible with 4.7L, 5.7L, and 6.4L V8 engines.

Pros:
– Excellent price for a full set of iridium plugs.
– Pre-gapped simplifies installation.
– Reliable performance due to the durable Iridium core.

Cons:
– As a less established brand, long-term consistency may not match NGK or Champion.

Best for: Budget-minded owners looking for a complete iridium upgrade set without needing to gap the plugs themselves.

Expert Opinion: The promise of pre-gapped iridium plugs for a dual-plug engine is a huge time saver. Just be sure to always double-check the gap before installing any plug.

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

This specialized NGK Iridium IX kit is tailored specifically for the heavy-duty Ram 2500 platform, which shares the 5.7L V8 engine with the 1500 but often sees heavier usage and higher demands. While similar to the other NGK Iridium set, this package confirms fitment for both the 5.7L and the larger 6.4L Hemi engines found in the 2500 and 3500 models, guaranteeing the proper heat range and dimensions for these workhorses.

Key features that stand out:
– Heavy-Duty Fitment: Confirmed compatibility for Ram 2500/3500 5.7L and 6.4L V8s.
– Genuine NGK Parts: Assurance of quality and precision engineering.
– Direct Replacement: Designed to seamlessly replace the original equipment components.

Pros:
– Trusted NGK iridium quality and longevity.
– Specific confirmation for heavy-duty truck applications.
– Excellent resistance to fouling and wear.

Cons:
– May be slightly overkill for a lightly used 1500 model.

Best for: Owners of Ram 2500 or 3500 trucks who need a robust, durable plug that can withstand higher operational stresses.

Expert Opinion: For trucks that tow or haul regularly, the consistent performance and durability of NGK Iridium IX plugs are absolutely essential for preventing misfires under heavy load.

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

NGK also offers a standard (typically copper or nickel alloy) plug set for the 5.7L Hemi. These plugs represent the classic, reliable choice that emphasizes excellent conductivity and superior anti-corrosion properties thanks to their Trivalent Metal Plating. While they won’t last as long as their Iridium counterparts, NGK Standard plugs are often an OE replacement for many applications and offer superb performance for the first 30,000 miles at a very attractive price point.

Key features that stand out:
– Trivalent Metal Plating: Provides superior anti-corrosion and anti-seizing properties.
– Precision Laser-Welded Electrode: Ensures reliable and precise spark delivery.
– OE Plug for Many Applications: A trusted choice for maintaining factory specs.

Pros:
– Best price point among the major brands (NGK, Champion).
– Exceptional anti-seizing properties aid in future replacement.
– Reliable, hot spark similar to factory copper plugs.

Cons:
– Requires the standard 30,000-mile replacement interval.

Best for: Budget-conscious Hemi owners who prefer the NGK brand integrity and don’t mind the shorter service life of standard plugs.

Expert Opinion: NGK Standard plugs are a great way to save money while still using a top-tier brand. If your Hemi is stock and you change fluids diligently, these are a reliable choice.

Comparison and Buying Insights

Choosing the right plugs for your Hemi often boils down to budget versus maintenance frequency.

If you prioritize the lowest possible cost and don’t mind frequent changes, the Champion Copper Plus sets (Products 1 and 3) and the NGK Standard Plugs (Product 10) are your best bet. Copper delivers the strongest initial spark, which some performance enthusiasts argue feels best, but be prepared to swap them out every 30k miles.

For the vast majority of 5.7L Hemi owners, Iridium is the smart investment. The NGK Iridium IX (Products 2 and 9) and Champion Iridium (Product 7) offer plug life exceeding 60,000 miles, making the painful 16-plug change a much less frequent chore. Iridium plugs are the choice for maximum durability and reduced long-term maintenance costs.

The platinum options, such as the Autolite Platinum (Product 6), provide a reliable middle ground, often lasting longer than copper but usually costing less than true iridium.

Finally, if your engine is showing signs of misfire or rough idle related to the coils, the Ignition Coil Pack and Spark Plug combos (Products 4 and 5) offer incredible value. Replacing the coils and plugs simultaneously is highly recommended to ensure the entire ignition system is fresh and working together efficiently.

Final Verdict: Our Top Picks for the 5.7L Hemi

When dealing with the complex, 16-plug ignition system of the 5.7L Hemi, the choice should balance proven performance with convenience.

If maximum longevity and reliability are your priority, we strongly recommend the 16 pc NGK Iridium IX Spark Plugs (Product 2). NGK’s precision and the durability of iridium mean you won’t need to touch those difficult-to-reach plugs for many years.

If you’re sticking to the original equipment philosophy for peak short-term performance and budget, the 16 pc Champion Copper Plus Spark Plugs (Product 1) are unbeatable. They deliver the hot spark the Hemi thrives on when new.

If you need a complete ignition overhaul due to rough running, the 8x Ignition Coil Pack and 16x Iridium Spark Plugs (Product 5) provide the best overall solution, pairing new coils with durable iridium plugs for years of reliable service.

Comprehensive FAQs About Best Spark Plugs for 5.7L Hemi

Q1: Why does the 5.7L Hemi engine require 16 spark plugs?

The 5.7L Hemi uses a dual-plug ignition system (two plugs per cylinder) primarily to improve combustion efficiency and reduce emissions. By igniting the fuel mixture from two points simultaneously, the combustion process is faster and more complete, which is crucial for meeting modern emissions standards and maximizing torque. This means a full spark plug job requires 16 plugs.

Q2: How often should I change spark plugs in my 5.7L Hemi?

The replacement interval depends heavily on the type of plug you choose. Copper spark plugs (like Champion Copper Plus) should typically be replaced every 30,000 miles or sooner. Iridium and Platinum spark plugs (like NGK Iridium IX) offer extended life and can often last 60,000 to 100,000 miles, depending on driving conditions and manufacturer recommendations.

Q3: Do I need to re-gap the spark plugs for my 5.7L Hemi?

While many premium plugs (like NGK and Champion) come pre-gapped for specific OE applications, it is highly recommended to always confirm the gap before installation. The correct gap setting for the 5.7L Hemi is critical for proper performance, especially with the dual-plug system. Check your owner’s manual or a service manual for the exact specification (typically around 0.045 to 0.050 inches, depending on the year).

Q4: Does the type of spark plug affect the MDS (Multi-Displacement System) on my Hemi?

The MDS system, which deactivates cylinders to save fuel, relies on a perfectly running ignition system. While the type of plug (copper vs. iridium) doesn’t directly interact with the MDS mechanism, a worn or fouling spark plug will certainly cause misfires when the MDS activates or deactivates. Using high-quality, properly gapped spark plugs ensures smooth transition and reliable operation of the MDS.

Q5: Is it worth upgrading from copper to iridium spark plugs?

Yes, for most drivers, it is worth the upgrade. While copper may offer marginally better performance when brand new, the benefit of iridium is its durability and longevity. Given the time and effort required to change 16 spark plugs in a Hemi, paying slightly more for iridium dramatically reduces the frequency of this maintenance task, saving significant labor costs over the life of the vehicle.

Q6: Can I use single platinum spark plugs in my Hemi?

While physically compatible, single platinum plugs are generally not the best choice for the 5.7L Hemi. Single platinum only features the precious metal on the center electrode, making the ground electrode susceptible to wear. Due to the rapid-fire, high-heat environment of the Hemi, if you choose platinum, dual-platinum or iridium plugs are recommended for better longevity and consistent spark over time.