Best Spark Plugs for 5.7 Hemi Ram

I’ve spent countless hours under the hood of my truck, and when it comes to keeping that mighty 5.7 Hemi Ram running strong, nothing matters more than the right spark plugs. Replacing these tiny components is essential for maintaining top-tier Hemi Ram performance and fuel economy. This guide breaks down the top choices we’ve tested, focusing on durability and whether classic copper, durable platinum, or premium iridium spark plugs are the right fit for your specific truck generation and driving needs.

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
	Ignition Coil Pack Spark Plugs fit for 5.7 Hemi Dodge…	View on Amazon
	16 pc Champion Iridium Spark Plugs compatible with Ram…	View on Amazon
	16 pc Autolite Platinum Spark Plugs compatible with Ram…	View on Amazon
	16 pc Champion Copper Plus Spark Plugs compatible with…	View on Amazon
	16 pc NGK Standard Spark Plugs compatible with Ram 1500…	View on Amazon

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

NGK Iridium IX plugs are often considered the gold standard for modern engines, especially those with high-tech demands like the Hemi’s Multi-Displacement System (MDS). These plugs offer exceptional longevity and reliable performance due to the strength and narrow profile of the iridium electrode. If you want “install and forget” reliability for the longest service interval possible in your newer Hemi, this is a fantastic choice that consistently delivers strong, efficient combustion and reduced maintenance hassle.

Key features that stand out:
– Genuine NGK NTK Quality: Built by the world leader in spark plug design.
– Improved Ignition and Spark Efficiency: Delivers outstanding spark focus for faster, more powerful combustion.
– Superior Anti-Seizing Properties: Trivalent metal plating prevents corrosion and sticking during future changes.
– Reduce Emissions and Misfires: Designed to protect the durable shell and ensure long-lasting capabilities.

Pros:
– Exceptional longevity, often rated for 80k-100k miles.
– Highly stable spark, crucial for reliable MDS system operation.
– Boosts overall engine performance and reduces misfires efficiently.

Cons:
– These are significantly more expensive than copper options.

Best for: Modern 5.7L Hemi owners (2011+) prioritizing the longest possible maintenance interval and premium performance.

Expert Opinion: While copper plugs offer great conductivity, the stability and lifespan of the Iridium IX are better suited for the precise timing and heat demands of modern, computer-controlled Hemi engines.

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

Champion Copper Plus plugs are an extremely popular choice, often regarded as the original equipment (OE) plug type favored by Dodge/Ram for their impressive conductivity. Copper offers the best electrical path, which translates to a crisp, powerful spark. While these plugs require more frequent replacement (typically every 30,000 miles), many Hemi enthusiasts feel the immediate power response and smoother idle are worth the extra labor. This set is specifically tailored for the newer Hemi engine design.

Key features that stand out:
– Genuine Champion Parts: A trusted OE supplier with deep racing heritage.
– Rely on Quality Spark Plugs: Built to meet modern engine demands for powerful performance.
– Unbeatable Conductivity: Copper provides maximum electrical flow for strong ignition.

Pros:
– Excellent cost-effectiveness and affordability.
– Provides superior conductivity for a very strong spark.
– Considered the classic choice for immediate throttle response.

Cons:
– Requires replacement three times as often as iridium plugs.

Best for: Owners who prioritize immediate throttle response, don’t mind frequent maintenance, or those running modified engines who want the highest electrical conductivity.

Expert Opinion: Champion has a long history with the Hemi, and these Copper Plus plugs are a fantastic, affordable option. Just make sure you commit to that 30,000-mile replacement schedule to keep misfires at bay.

Ignition Coil Pack Spark Plugs fit for 5.7 Hemi Dodge Ram 1500, Chrysler 300, Challenger Charger Durango, Jeep Commander Grand Cherokee, 2009-2020

This combo kit is a practical solution if you’re experiencing multiple engine misfires or have high mileage on your truck and suspect both the plugs and coils are failing. This kit provides all 8 ignition coils (Part Number: UF504) plus a full set of spark plugs, offering a complete system refresh in one go. The parts are designed to meet or exceed OEM specifications, making it a great value proposition for a full tune-up.

Key features that stand out:
– Complete Tune-Up Kit: Includes 8 ignition coils and 8 spark plugs (note: Hemi uses 16 plugs, so check compatibility/quantity needed).
– OEM Specification Match: Coils and plugs are produced under high standards with premium materials.
– Problem Solver: Designed to fix issues like Engine Misfire, Hard to Start, Rough Engine Idle, and Poor Fuel Economy.

Pros:
– Exceptional value when replacing both coils and plugs simultaneously.
– Simplifies the purchasing process with a single kit.
– Addresses the entire ignition system for maximum reliability improvement.

Cons:
– Because this is an aftermarket kit, long-term durability might not match premium OEM brands.

Best for: Hemi owners tackling high-mileage ignition issues or needing a comprehensive, cost-effective system overhaul.

Expert Opinion: When replacing spark plugs, especially on older 5.7L models, the coils are often due for replacement as well. Doing both at once ensures the entire ignition chain is working optimally, making this combo highly appealing for maintenance.

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

Champion’s Iridium offering combines the brand’s Hemi experience with the durability of modern precious metals. These plugs are designed to minimize quenching and misfires by utilizing a fine-wire center electrode and v-trimmed ground electrode, creating a sharply focused flame kernel. This results in faster combustion and superior performance compared to standard copper plugs while providing impressive longevity, competing directly with NGK’s iridium line.

Key features that stand out:
– Enhance Performance: Fine-wire electrode allows for quicker ignition and minimizes misfires.
– Superior Durability: Built with Iridium to withstand high-pressure environments common in the Hemi engine.
– Adheres to Toughest Industry Standards: Ensures a great fit and extended plug life.

Pros:
– Provides excellent performance combined with 80k+ mile durability.
– Champion’s heritage means great fitment for Ram trucks.
– Resistant to spark erosion under harsh conditions.

Cons:
– Premium price point places them in the highest cost category.

Best for: Owners loyal to the Champion brand who require maximum longevity and stable performance for their modern Hemi.

Expert Opinion: Champion Iridium plugs are a fantastic hybrid—you get the brand reliability Hemi owners trust, coupled with the extended service life that modern engine maintenance demands. They are a solid “set-it-and-forget-it” option.

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

Autolite Platinum plugs provide a great middle ground between the short life of copper and the high cost of iridium. These plugs feature a platinum-to-platinum firing surface for durability, and the platinum-enhanced high nickel alloy side electrode works to maintain a precision gap, ensuring virtually no gap erosion over its lifespan. They fire quicker and cleaner with less required voltage than traditional plugs, aiding in easier starting and quicker acceleration.

Key features that stand out:
– Platinum-to-Platinum Firing: Offers superior durability and longer life than standard copper or single-platinum plugs.
– Super Conductive Yttrium Enhanced Ground Electrode: Provides superior heat transfer.
– Maximum Performance: Necked-down center electrode fires quicker and cleaner.
– Optimized Engine Performance: Works to improve fuel economy and engine lifespan.

Pros:
– Better longevity (typically 50k-60k miles) than copper at a lower price than iridium.
– Reduced voltage requirements help with starting reliability.
– Excellent resistance to gap erosion.

Cons:
– Longevity is still less than premium iridium options.

Best for: Drivers looking for an excellent balance of cost, performance, and durability who don’t want to pay the top price for iridium.

Expert Opinion: Platinum is a very stable metal and works exceptionally well in the Hemi, especially if you’re upgrading from the original copper but aren’t ready to shell out for Iridium. They represent great long-term value.

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

This specific set of Champion Copper Plus plugs is tailored for the earlier generation of the 5.7L Hemi engine (often referred to as the 3rd Gen Ram). These older engines sometimes thrive better on copper plugs due to their original design specifications. Just like the newer copper set, these plugs guarantee maximum conductivity for that powerful, immediate spark that many traditionalists love.

Key features that stand out:
– Specific Fitment (2003-2008): Ensures the correct plug characteristics for the older Hemi design.
– Genuine Champion Parts: Trustworthy quality built to adhere to tough industry standards.
– Reliable Copper: Provides high electrical conductivity for strong ignition performance.

Pros:
– Ideal OE replacement for first-generation Hemi trucks.
– Best possible electrical conductivity.
– Extremely budget-friendly.

Cons:
– Requires the most frequent plug changes of any material listed.

Best for: Owners of 2003–2008 Dodge Ram 1500 5.7L V8 trucks looking for an OE-style, budget-friendly replacement.

Expert Opinion: If you have one of the older, pre-2009 Hemi trucks, sticking to the OE Copper Plus design is often the easiest path to restoring smooth performance without worrying about modern plug incompatibility.

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

The NGK Standard plugs offer a cost-effective, high-quality replacement option derived from NGK’s OE plug line. While these are Standard (usually nickel alloy or similar non-precious metal), they carry the benefit of NGK’s exceptional manufacturing quality, including trivalent metal plating for superior anti-corrosion and anti-seizing properties. They are an excellent option for someone who wants the reliability of NGK without the price tag of Iridium.

Key features that stand out:
– OE Plug for Many Applications: Proven track record in factory vehicles.
– Precision Laser-Welded Electrode: Ensures quality construction.
– Trivalent Metal Plating: Significantly reduces the chances of seizing in the cylinder head during removal.

Pros:
– Reliable NGK quality at a very competitive price point.
– Excellent anti-corrosion properties simplify future maintenance.
– Dependable performance for routine daily driving.

Cons:
– Shorter lifespan compared to Iridium or Platinum plugs.

Best for: Budget-conscious Hemi owners (2011+) looking for high-quality OEM replacements for routine maintenance.

Expert Opinion: These are straightforward, dependable plugs. If your main goal is simply to meet the recommended maintenance schedule with a brand you trust and without breaking the bank, NGK Standard is a solid contender.

Comparison Insights on 5.7 Hemi Plugs

When choosing the right set for your 5.7 Hemi, it boils down to your budget versus your desired maintenance interval.

If longevity is your main concern and you hate performing engine maintenance, you absolutely must stick with premium Iridium options like the NGK Iridium IX or the Champion Iridium. They are engineered to provide stable, long-lasting performance for 80,000 miles or more, which is great for the complicated MDS system.

For those on a tighter budget, or if you prioritize raw electrical conductivity and throttle response, the Champion Copper Plus is the classic Hemi choice. Copper offers the best spark, but remember, they should be changed every 30,000 miles to prevent misfires caused by electrode erosion.

Platinum plugs, like the Autolite Platinum, offer a perfect middle ground, giving you substantial life (around 50,000–60,000 miles) without the premium price tag of iridium.

Finally, if you’re currently solving issues like engine misfires and rough idling, the Ignition Coil Pack and Spark Plug combo offers excellent value, ensuring that both key components in your ignition system are refreshed simultaneously.

Final Verdict

Choosing the best spark plug for your 5.7 Hemi Ram depends entirely on your driving habits and willingness to perform maintenance. Here is our recommendation based on three key needs:

For Maximum Longevity & Low Maintenance: Go with the NGK Iridium IX Spark Plugs. Their stability is unmatched, and they offer the longest service interval, making them ideal for modern Rams.

For Best Performance & Value (If you change often): Stick with the 16 pc Champion Copper Plus Spark Plugs. You can’t beat copper conductivity, and they are the budget-friendly favorite of Hemi enthusiasts.

For the Best All-Around Upgrade: We recommend the 16 pc Autolite Platinum Spark Plugs. They provide excellent durability and reliable performance that significantly outlasts copper, without demanding the highest price of iridium.

Frequently Asked Questions About Best spark plugs for a 5.7 Hemi Ram

How many spark plugs does a 5.7 Hemi Ram require?

The 5.7L Hemi V8 engine uses a dual spark plug design, meaning it requires 16 spark plugs in total (two plugs per cylinder). It’s crucial that you replace all 16 at the same time for balanced performance and ignition timing.

What spark plug material works best with the Hemi MDS system?

The Multi-Displacement System (MDS), which shuts down four cylinders for fuel economy, requires very stable ignition timing. Iridium spark plugs (like NGK Iridium IX or Champion Iridium) are generally preferred for MDS-equipped Hemi engines because their fine-wire electrodes maintain a consistent, powerful spark over much longer periods, minimizing potential misfires when the system activates or deactivates.

What is the recommended change interval for 5.7 Hemi spark plugs?

The recommended interval depends entirely on the plug material:
* Copper: Change every 30,000 miles.
* Platinum: Change every 50,000–60,000 miles.
* Iridium: Change every 80,000–100,000 miles.
Always refer to your truck’s specific owner’s manual and the plug manufacturer’s recommendations.

Do I need to gap new spark plugs for my 5.7 Hemi?

While many premium plugs (especially iridium) come “pre-gapped” from the factory, it is always recommended to double-check the gap size before installation using a specialized gapping tool. Hemi engines are sensitive to the correct gap, which usually falls around 0.040 to 0.044 inches depending on the year and plug type. Never assume the gap is perfect; verify it to ensure proper ignition.

Why do some people prefer copper plugs even though they don’t last as long?

Copper is the most electrically conductive material used in spark plugs. Enthusiasts who prioritize maximum spark energy, especially in older Hemi models or those used for high-performance driving, often prefer copper because it provides the strongest, most immediate spark available. They accept the frequent maintenance required because of this performance benefit.

What are the main symptoms of worn-out spark plugs in a 5.7 Hemi?

Common signs that your 5.7 Hemi needs new spark plugs include decreased fuel economy, difficulty starting, a noticeable loss of power or sluggish acceleration, rough idling (shaking or vibrating when stopped), and the dreaded “check engine light” accompanied by misfire codes (P0300 series).