Best Spark Plugs For Chrysler 300C Hemi

When I first tackled the spark plug change on my Chrysler 300C Hemi, I quickly realized just how important—and numerous—those little components are. You need 16 of them to keep that powerhouse V8 running smoothly! Choosing the Best Spark Plugs For Chrysler 300C Hemi isn’t just about maximizing horsepower; it’s about ensuring reliable starting, stable idle, and efficient combustion. We’ve done the deep dive into the top contenders, from OE-spec Champion copper options to high-mileage iridium choices, so you can confidently upgrade your ignition system.

IMAGE	PRODUCT NAME	AMAZON LINK
	16 pc Champion Copper Plus Spark Plugs compatible with…	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 V-Power Spark Plugs compatible with Chrysler…	View on Amazon
	16 pc Champion Platinum Spark Plugs compatible with…	View on Amazon
	16 pc Champion Copper Plus Spark Plugs compatible with…	View on Amazon
	Compatible with JEEP Compatible with DODGE Compatible with…	View on Amazon
	ENA Set of 16 Iridium Spark Plug Compatible with Chrysler…	View on Amazon
	Ignition Coil Pack Spark Plugs fit for 5.7 Hemi Dodge…	View on Amazon
	MOTOKU Ignition Coil and Spark Plug Wires for Chrysler…	View on Amazon

16 pc Champion Copper Plus Spark Plugs compatible with Chrysler 300 5.7L V8 2009-2019

If you’re driving a newer 300C and aiming for factory-spec reliability and performance, these Champion Copper Plus plugs are often considered the gold standard. Champion has deep roots with Mopar engines, and these plugs are designed specifically to meet the high demands of the 5.7L Hemi used from 2009 onward. Copper provides the highest conductivity which is ideal for the Hemi’s firing requirements, though they require replacement more frequently.

Key features that stand out:
* Genuine Champion parts ensuring OE-quality fitment and performance.
* Copper core construction delivers excellent conductivity for a powerful spark.
* Direct replacement auto parts designed to meet the toughest industry standards.

Pros:
* Excellent thermal conductivity, often preferred for maximum short-term performance.
* Cost-effective option when buying in the 16-pack required for the Hemi.
* Reliable OE-quality performance.

Cons:
* Requires service replacement more frequently than platinum or iridium alternatives.

Best for: Drivers with 2009+ models who prefer sticking strictly to the OEM copper specification and plan on changing plugs every 30,000 miles.

Expert Opinion: Champion Copper plugs are the recommended baseline for the Hemi. They provide robust performance critical for proper Hemi function, especially when dealing with the MDS system.

16 pc Champion Copper Plus Spark Plugs compatible with Chrysler 300 5.7L V8 2005-2008

For owners of the first-generation 300C (pre-2009), this set of 16 Champion Copper Plus plugs provides the exact OE fitment needed. Just like the newer model plugs, these use a highly conductive copper core which is crucial for delivering the necessary ignition energy for the robust Hemi engine. Choosing Champion ensures you are replacing parts with the brand Mopar originally trusted.

Key features that stand out:
* Specific fitment for 2005-2008 5.7L V8 models.
* Built with durable materials minimizing wear and tear typical in competitors.
* Trusted brand history backed by racing success and OE manufacturing expertise.

Pros:
* Perfect fit and reliable performance for early Hemi engines.
* Excellent power delivery due to high copper conductivity.
* Ensures consistent engine operation.

Cons:
* The shorter service life means more frequent maintenance intervals.

Best for: Owners of 2005-2008 300C Hemi models seeking factory-original spark performance and conductivity.

Expert Opinion: For these older models, adherence to the specific OE copper recommendation often leads to the smoothest operation, assuming owners are diligent about the 30k mile replacement schedule.

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

Stepping into the high-performance category, this Autowxjq set offers a full 16-piece kit of iridium plugs. Iridium is known for its extremely high melting point, which translates directly into superior durability against heat and electrical wear, making them perfect for drivers looking for maximum mileage between changes. These plugs often come pre-gapped for simpler installation.

Key features that stand out:
* Iridium center electrode tip for maximum longevity and sustained performance.
* Pre-gapped from the factory, allowing for direct installation in most cases.
* Broad compatibility across multiple 5.7L Hemi platforms.

Pros:
* Significantly longer lifespan than copper or platinum alternatives.
* High resistance to fouling and electrical erosion.
* Backed by a 2-year warranty for peace of mind.

Cons:
* Some users may prefer a more established, name-brand manufacturer for iridium plugs.

Best for: The mileage-conscious Hemi owner who prioritizes long replacement intervals (up to 100,000 miles) over the absolute highest conductivity of copper.

Expert Opinion: While copper is the OE choice, well-engineered iridium plugs like these can offer excellent combustion stability and huge time savings on maintenance, provided the gap is double-checked before installation.

16 pc NGK V-Power Spark Plugs compatible with Chrysler 300 5.7L V8 2005-2008

NGK is a globally respected name in ignition components, and their V-Power plugs are a fantastic non-OE option for the early 300C Hemi. These plugs feature a unique V-groove center electrode, which aids in focusing the spark to improve ignitability and efficiency. They are reliable, genuine NGK parts designed as a direct replacement.

Key features that stand out:
* NGK V-Power design improves ignition efficiency and reduces quenching.
* High-grade alumina silicate ceramic insulator for strength and heat transfer.
* Triple-gasket sealing process prevents combustion gas leakage.

Pros:
* Reputable, high-quality manufacturing from NGK.
* Improved ignitability over standard copper plugs.
* Proven reliability in Hemi engines.

Cons:
* Similar service life to Champion copper plugs, requiring frequent changes.

Best for: Hemi owners who want a quality, high-conductivity copper alternative to Champion plugs, trusting NGK’s reputation for consistency.

Expert Opinion: NGK V-Power plugs are always a safe bet. They perform similarly to the OE Champions in terms of conductivity but benefit from NGK’s proprietary electrode design for marginally better cold starts.

16 pc Champion Platinum Spark Plugs compatible with Chrysler 300 5.7L V8 2005-2008

If you want better longevity than standard copper but aren’t ready to jump to iridium, Champion Platinum plugs offer a great compromise. Platinum center electrodes resist wear much better than copper, extending the life of the plug significantly. This set is specifically tailored for the earlier 300C Hemi generation, providing long-lasting, durable performance.

Key features that stand out:
* Platinum construction ensures better longevity than standard copper plugs.
* Built to OE standards for seamless replacement in 2005-2008 models.
* Improved durability minimizes wear and tear.

Pros:
* Much longer service life than copper plugs (typically 50,000 to 60,000 miles).
* Maintains the Champion OE quality.
* Good balance between performance and maintenance interval.

Cons:
* Platinum conductivity is slightly lower than copper, though generally negligible for stock engines.

Best for: Drivers of the first-gen 300C Hemi who want to extend their spark plug change interval past 30,000 miles without using aftermarket iridium options.

Expert Opinion: Platinum plugs are a solid middle ground. They save you a plug change compared to copper over a high mileage span, making them very popular for daily driven 300C models.

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

While this product specifies the Dodge Ram, the 5.7L V8 Hemi engine from this era shares significant architecture and spark plug requirements across the Chrysler, Dodge, and Jeep platforms. These are the classic highly conductive Champion Copper Plus plugs. For 300C owners who cross-reference parts or find a better price point on this widely compatible set, they offer the dependable copper performance the Hemi needs.

Key features that stand out:
* High conductivity copper core for reliable ignition energy.
* Genuine Champion parts built on years of OE experience.
* Durable construction designed for long-lasting performance in V8 engines.

Pros:
* Trusted Champion reliability and performance.
* Excellent price point for a full set of 16 plugs.
* Meets critical Hemi engine requirements.

Cons:
* The product description emphasizes Ram, so users should confirm the exact part number match for their 300C.

Best for: Budget-conscious buyers or those performing simultaneous maintenance across different Hemi platforms who need standard, reliable copper plugs.

Expert Opinion: The 5.7L Hemi is largely universal in its spark plug spec within a certain year range. These are the tried-and-true Champion coppers, delivering consistent performance that Hemi owners expect.

Compatible with JEEP Compatible with DODGE Compatible with CHRYSLER RAM 5.7 6.1L HEMI SPARK PLUGS (1) OEM NEW Compatible with MOPAR 68303913AA

When absolute peace of mind is the goal, going straight to the source with Genuine Mopar OEM spark plugs is the way to go. This product listing confirms the use of the Mopar 68303913AA part number, which is the official factory plug for a wide range of Hemi applications, including the 300C. Note that the listing is for a single plug, so you’ll need to purchase 16 units for a complete change.

Key features that stand out:
* Authentic Mopar OE Spec part number 68303913AA.
* Factory standard performance for flawless compatibility with all Hemi systems.
* Compatible with both 5.7L and high-performance 6.1L Hemi engines (SRT models).

Pros:
* Guaranteed perfect fitment and function, matching the original equipment.
* Ideal choice for warranty concerns or strict restoration projects.
* Highest level of quality assurance.

Cons:
* The cost per plug is typically higher than aftermarket equivalents, and 16 units are required.

Best for: The discerning Hemi owner who demands factory original parts and requires the gold standard in OE performance for their 300C or 300C SRT.

Expert Opinion: If budget isn’t the primary constraint, Mopar OE plugs are undeniably the safest choice. They are gapped and designed specifically for optimal Hemi combustion dynamics.

ENA Set of 16 Iridium Spark Plug Compatible with Chrysler Dodge Jeep Ram 300 Challenger Charger Durango Commander Grand Cherokee 1500 5.7L Replacement for 5018 LFR5AGP

The ENA Iridium set is another excellent choice for Hemi owners looking for long service intervals. This 16-plug kit is designed to replace popular stock plug numbers like LFR5AGP, indicating strong compatibility across the 5.7L platform. Iridium provides a steady, powerful spark over an extended period, making this an ideal choice for high-mileage daily drivers.

Key features that stand out:
* Engineered for reliable operation under all conditions.
* Iridium construction offers excellent resistance to electrical erosion.
* Broad application compatibility covering many 5.7L vehicles.

Pros:
* Quick and easy installation process.
* Excellent long-term value due to extended replacement intervals.
* Reliable performance matching replacement standards.

Cons:
* Requires users to carefully cross-reference their specific Hemi year/model due to the broad compatibility list.

Best for: The driver focused on minimizing maintenance time while ensuring the Hemi still gets a consistent, high-quality spark from a complete iridium set.

Expert Opinion: ENA offers competitive quality in the aftermarket iridium segment. Just remember that while iridium lasts longer, it doesn’t hurt to check the plugs visually every 50k miles anyway.

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 product is unique because it offers a combo pack of 8 ignition coils and spark plugs—a smart approach for high-mileage 300C models, especially those built after 2009. While the Hemi uses 16 spark plugs, it only uses 8 ignition coils (one for every two plugs). Replacing both coils and plugs simultaneously is the best way to restore the entire ignition system and cure common issues like misfires or rough idling.

Key features that stand out:
* Complete ignition system refresh (8 coils and associated plugs included).
* Coils meet or exceed OEM specifications (part number UF504).
* Addresses common issues like engine misfire, hard starting, and poor fuel economy.

Pros:
* One-stop solution for a complete ignition system overhaul.
* Excellent preventative maintenance for older vehicles.
* Coils and plugs are matched for seamless function.

Cons:
* Requires the purchase of a second set of 8 spark plugs to complete the full 16-plug change.

Best for: Hemi owners with high-mileage 2009+ 300C models experiencing noticeable ignition issues, where a full coil and plug refresh is necessary.

Expert Opinion: Replacing coils and plugs together offers the most reliable outcome for curing chronic engine hesitation or misfires. This kit provides the necessary high-quality components to tackle the job right, but remember you’ll need 8 more plugs.

MOTOKU Ignition Coil and Spark Plug Wires for Chrysler 300C Jeep Grand Cherokee Dodge Durango Ram 1500 2500 3500 5.7

The 5.7L Hemi in the earliest 300C models (specifically 2005) utilized coil-on-plug technology, but some early Hemi variants or specific package configurations may still use plug wires. This comprehensive kit includes ignition coils and spark plug wires, making it a great solution for those servicing an older Hemi that utilizes the traditional wire setup, or simply performing deep preventative maintenance.

Key features that stand out:
* Comprehensive kit including ignition coils and spark plug wires.
* Compatible with 2005 Chrysler 300C (and other early Hemi models).
* Restores proper voltage delivery across the ignition system.

Pros:
* Ideal for diagnosing and fixing multiple component failures (coils/wires).
* Covers essential components often neglected during routine maintenance.
* Broad compatibility with early 5.7L Hemi engines.

Cons:
* The required spark plugs are not included in this kit, only the wires and coils.

Best for: Owners of 2005 300C models who need to refresh their ignition system wires and coils alongside their spark plug change.

Expert Opinion: Always confirm if your specific 300C utilizes wires or not before purchasing. If your Hemi is an early model and uses wires, replacing them with the coils ensures maximum spark energy transfer to the plugs.

Helpful Comparison Short Insights

When choosing the Best Spark Plugs For Chrysler 300C Hemi, your decision boils down to your budget and how often you want to perform maintenance.

For peak performance and the true OE feel, you can’t beat the Champion or NGK V-Power copper plugs (Products 1, 2, 4, and 6). These plugs offer the absolute best electrical conductivity, which is important for the quick, powerful spark needed by the Hemi’s design. However, be prepared to change them every 30,000 miles.

If you hate the idea of routine maintenance, the iridium options (Products 3 and 8) offer the most incredible longevity, often rated up to 100,000 miles. While the iridium material isn’t quite as conductive as copper, the performance difference is typically unnoticeable in a stock or lightly modded 300C. These are the best long-term value options.

The Mopar OEM plugs (Product 7) represent the highest quality standard and are the definitive choice if factory fitment and strict adherence to specifications are your primary concern. Lastly, consider the combo packs (Products 9 and 10) if your vehicle is high mileage and you suspect your coils or wires are also failing—a new spark plug can’t compensate for a weak ignition coil.

Final Verdict

Choosing the right spark plug for your Chrysler 300C Hemi depends entirely on your driving habits and tolerance for maintenance.

The OEM Standard Pick: For most drivers seeking the tried-and-true factory feel, the 16 pc Champion Copper Plus Spark Plugs (specifically the set matching your year range, 2005-2008 or 2009-2019) is the definitive choice. They are cost-effective and match the original specifications that the Hemi was designed around.

The Long-Haul King: If you drive high mileage and only want to change plugs every five to ten years, the Autowxjq Iridium Spark Plug 16pcs provides the best balance of longevity and performance stability, saving you significant time and effort in the long run.

The Complete System Refresh: For 300C owners battling misfires or rough idle on high-mileage engines, the Ignition Coil Pack Spark Plugs combo (Product 9) offers a powerful solution by replacing the often-overlooked coils alongside the plugs, guaranteeing the highest quality spark delivery.

Best Spark Plugs For Chrysler 300C Hemi: Frequently Asked Questions

## How many spark plugs does the Chrysler 300C 5.7L Hemi engine require?

The Chrysler 300C 5.7L Hemi engine utilizes a twin-plug design, meaning it requires 16 spark plugs in total—two plugs per cylinder. It is essential to replace all 16 simultaneously for balanced performance and consistent combustion.

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

This depends on your priorities:
* Copper: Highest conductivity, best performance for high-load/modded engines, but must be replaced every 30,000 miles. Copper is the original equipment standard.
* Platinum: Longer life (50,000–60,000 miles) and a good compromise for daily drivers.
* Iridium: Longest life (up to 100,000 miles). Best for minimizing maintenance, offering excellent long-term stability for stock engines.

## What is the recommended service interval for changing spark plugs in the 5.7L Hemi?

For the OE-specified copper spark plugs (like Champion Copper Plus), the recommended replacement interval is typically 30,000 miles. If you install high-quality iridium plugs, you can generally extend this interval to 100,000 miles, although checking them periodically is still advised.

## Is gapping necessary for new spark plugs installed in a 300C Hemi?

While many modern platinum and iridium spark plugs (like the Autowxjq set) come pre-gapped, it is always highly recommended to check the gap before installation using a proper gapping tool. Hemi engines are sensitive to the exact gap setting for optimal combustion, especially if the plug gap is slightly different than the manufacturer recommends for that specific year/model.

## How does the spark plug choice affect the Hemi’s Multi-Displacement System (MDS)?

The MDS system, which deactivates cylinders under light load, relies on a perfect and immediate spark when those cylinders reactivate. Using the recommended copper plugs (or high-quality iridium plugs designed for the Hemi) ensures consistent ignition, which is critical for smooth transitions when the MDS activates and deactivates. Poor-quality or incorrect spark plugs can lead to roughness or hesitation during MDS cycling.

## When should I consider replacing the ignition coils along with the spark plugs?

If your Chrysler 300C Hemi has over 100,000 miles, or if you are experiencing repeated engine misfires (even after installing new plugs), it is highly advisable to replace the ignition coils (the Hemi uses 8 coils). Worn-out coils cannot deliver the necessary voltage, rendering even the best spark plugs ineffective. Combo packs like the NPAUTO set (Product 9) are ideal for this complete system overhaul.