10 Best Spark Plugs for 5.7 Hemi

The Hemi engine has been in production for several decades and over the years has become one of the best engines on the market. But when it comes time to swap the spark plugs, choosing the right product is no trivial task. After all, there are 16 spark plugs to replace, which is going to take quite a sum of cash and time.

Our top pick is the Yoshi Motors Pack of 8 Engine Performance Ignition Coil and 16 Spark Plug as it includes 8 ignition coils, 16 spark plugs, and wiring and is compatible with Chrysler, Dodge, and Jeep.

In this article, we review the 10 best spark plug kits for a Hemi 5.7 engine – we have done all the research so you don’t have to.

In a Hurry? Here Are Our Top Three Picks

Image	Title	Price	Buy
Top	Yoshi Motors Pack of 8 Engine Performance Ignition Coil and 16 Spark Plug With Wire Set Replacement For Chrysler Dodge Jeep Ram 2003 2004 2005 300 Durango Magnum 5.7L V8 56028394AD UF378 UF505	Buy Now
	MCK 8pcs Engine Ignition Coil Pack And Spark Plug With Hemi Wireset Tune Up Kit Compatible With Chrysler Dodge Jeep 300 Durango Magnum Ram 1500 2500 3500 Grand Cherokee 2003-2005 5.7L 5.7 V8 UF378	Buy Now
	APDTY 141491 Spark Plug & Ignition Wire Tune Up Kit Fits 5.7L Hemi On 2005 Chrysler 300 Dodge Magnum or Jeep Grand Cherokee (Includes All 16 Spark Plugs, 8 Ignition Wires, 8 Ignition Coil Boots)	Buy Now

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What Is a 5.7 Hemi Engine?

The Hemi engine was first developed at the beginning of the 1900s and the unique hemispherical design can be found in early four-cylinder engines.

However, it wasn’t until the beginning of the 1950s that excitement began to grow around the Hemi engine.

In 1950, Chrysler built a V8 Hemi engine with 331 cubic inches of displacement, providing 180 horsepower – this may not seem like much now but that was impressive for the time.

This innovative Hemi engine made its debut in the 1951 Chrysler Saratoga, Imperial, and New Yorker vehicles.

Different variations of the Hemi engine have been developed over the years and in 2003, Chrysler released the third generation Hemi, the 5.7l V8 providing 345 cubic inches of displacement.

In 2022, this engine continues to be used in several Chrysler, Jeep, and Dodge vehicles.

The 5.7L Hemi engine has eight cylinders and 16 spark plugs. This engine may provide exceptional power and performance, but the spark plugs will not perform at their best forever.

If it is time to replace the spark plugs in your Hemi engine, keep reading as we review the 10 best spark plug kits available on the market today.

10 Best Spark Plugs for 5.7 Hemi

If you want to save money on labor costs, it is possible for you to replace the spark plugs in a Hemi engine yourself at home.

However, you don’t want to swap old worn spark plugs for poor-quality new ones.

To help you find the best spark plugs for your vehicle, here is our list of the 10 best spark plugs available to buy on Amazon in 2022.

1. Yoshi Motors Pack of 8 Engine Performance Ignition Coil and 16 Spark Plug

This set from Yoshi Motors includes 16 spark plugs, eight ignition coils, and a set of wires.

If you are noticing signs that your spark plugs need changing, this set has almost everything you will need to replace them yourself at home.

As well as buying this kit, you will also need a socket wrench with a spark plug socket, in order to replace the spark plugs in your 5.7L Hemi engine.

Not all Hemi engines use the same spark plugs, this particular set is compatible with the Chrysler 300 5.7L V8 2005, Dodge Ram 1500 5.7L V8 2003-2005, Dodge Magnum 5.7L V8 2005, Dodge Durango 5.7L V8 2004-2005, Dodge Ram 2500/3500 5.7L V8 2003-2005 and the Jeep Grand Cherokee 5.7L V8 2005.

This set of high-quality spark plugs is heat and electrical-resistant, as well as being strong and durable enough to last for several years.

Pros

• Quick and easy installation.
• All 16 spark plugs are included.
• Spark plug wires are included in the set.

Cons

• Some issues with longevity.

2. MCK Engine Ignition Coil Pack and Spark Plugs

If you have any of the following vehicles, this set from MCK has all the spark plugs and replacement coils that you will need for your 5.7l 8-cylinder Hemi engine: Jeep Grand Cherokee 2005, Chrysler 300 2005, Dodge Magnum 2005, Dodge Durango 2004, and the Dodge Ram 1500/2500/3500 2003 – 2005.

This spark plug and coil set from MCK is made up of top-quality parts and you can expect professional quality and performance.

The parts are corrosion and heat-resistant and are built with longevity in mind. Your car will be running smoothly again in no time, once you replace the oil spark plugs with these from MCK.

Pros

• Easy installation.
• compatible with a wide range of vehicles.
• 100,000 miles guaranteed.

Cons

• Some issues with quality.

3. APDTY 141491 Spark Plug & Ignition Wire Tune Up Kit

Here is another excellent kit, including all the parts you need to replace your worn out and failing spark plugs. Each cylinder in a Hemi engine needs two spark plugs and it is best practice to replace all plugs at the same time, to achieve more even wear over the years.

This set from APDTY is compatible with the following vehicles with a 5.7L Hemi engine: Chrysler 300 2005, Dodge Magnum 2005, and the 2005 Jeep Grand Cherokee.

Pros

• Operates at stable temperatures.
• Highly durable.
• The risk of engine misfire is smaller.

Cons

• Can be on the expensive side.

4. ENA Set of 8 Ignition Coil Pack and Set of 16 Iridium Spark Plug

If you have a slightly more modern vehicle than those we have already mentioned, this may be the spark plug kit for you. This set of coils and spark plugs from ENA is compatible with the following vehicles: the 2014 – 2016 Dodge Charger/Challenger/Durango, the 2014 – 2016 Chrysler 300, the 2014 – 2017 Ram 1500/2500/3500, and the 2014 – 2016 Jeep Grand Cherokee.

The coils and spark plugs in this kit are built to OE standard specifications or above and they have been purposefully designed to perform well under the heat and stress of the engine. The coils are made with top-quality copper to provide the best protection against misfires and ignition failure.

Pros

• Made to be resistant to corrosion and engine stress.
• High quality at an affordable price.
• Easy installation.

Cons

• Some issues with engine problems after fitting.

5. MCK 8pcs Racing Ignition Coil Pack And Platinum Spark Plug

Here is another 5.7L Hemi spark plug replacement kit from MCK, this set is compatible with a wider variety of vehicles. You can use these spark plugs in the following trucks: Ram 1500/2500/3500 2011-2015 with the 5.7L V8 engine and the Ram 2500/3500 2014 – 2016 6.4L V8 engine.

These spark plugs are also compatible with the Dodge Challenger/Charger 2009-2015, Dodger Ram 1500 2009 – 2010, and the Dodge Durango 2009 – 2014. This set from MCK is so versatile, the components can even be used in the Chrysler Aspen 2009, the Chrysler 300 2010 – 2014, the 2010 Jeep Commander, and the 2009 – 2015 Jeep Grand Cherokee.

If you are noticing a loss of power or noisy idling, it might be time to replace the spark plugs. The coils and plugs in this set are of premium quality and can be installed by the most novice of DIY mechanics.

Pros

• Durable
• Improvement in horsepower.
• Good customer services.

Cons

• Pregapping may be required.

6. Denso Set of 16 Iridium TT Spark Plugs

This set of 16 spark plugs from the brand Denso has a 0.04 gap and is compatible with certain Dodge, Ram, and Jeep models that use a 5.7L V8 Hemi engine. You may need to visit the Denso website or speak with a professional to check if these spark plugs are compatible with your exact vehicle make and model.

These spark plugs have a built-in resistor which eliminates electromagnetic noise and prevents interference from electronic devices. These plugs also have a 360 laser welded tip, designed to stay firmly in place even under the most stressful engine conditions. The Denso spark plugs use iridium alloy which has a very high melting point, making these spark plugs heat resistant and able to perform at their best at all times.

Pros

• Compatible with Dodge, Ram, and Jeep.
• Built-in resistor.
• Really high melting point.

Cons

• Need to contact the manufacturer directly to confirm compatibility with your vehicle.

7. Bosch Automotive (8162) OE Fine Wire Double Platinum Spark Plug

If you have a high-performance vehicle such as the 5.7 Hemi they are going to be an excellent choice.

After installation, you will notice improvements such as faster starting and no lagging.

In addition to these, you will also notice that your vehicle will run better at higher speeds.

These Bosch spark plugs are also long-lasting and durable.

Pros

• Durable.
• Improve performance.
• Good for the budget.

Cons

• Have to ensure you have the correct ones for your vehicle.

8. Chrysler 300 Jeep Dodge Ram 1500 Set of Sixteen

This Chrysler spark plug is a great choice for the 5.7 Hemi and can help you get better mileage. Designed to work on the Dodge Ram 1500.

They come with four packs of spark plugs providing you with enough for your truck’s 16 engine cylinders.

The spark plugs are made from nickel which is known for retaining conductivity.

As these are OEM plugs they should fit straight into your 5.7l Hemi without any problems.

Pros

• Replacements for all 16 cylinders.
• Made from nickel.
• Quick and easy installation.

Cons

• Not pregapped.

9. NGK Standard Series Spark Plug LZFR5C-11

These spark plugs from NGK can provide the optimum spark needed to start your engine every time.

They have a chrome base so there are no concerns about them sticking.

Trivalent metal plating ensures that these plugs have superior anti-corrosion and anti-seizing properties.

Compatible with Ram 1500 2013.

Pros

• Made in the United States.
• Good heat removal.
• Copper core.

Cons

• You may have to gap them yourself.

10. Chrysler 300 Jeep Dodge Ram 1500 Set of Sixteen Spark Plugs OEM

The Mopar spark plugs are probably one of the best spark plugs for your 5.7 Hemi engine.

These spark plugs are mostly made of nickel but their ceramic insulator ensures that they’re super strong. They also transfer heat really well making them a good contender in the spark plug industry for this engine in particular.

These spark plugs come with triple seals which prevent leakage of any sort.

Nobody likes an easily corroded spark plug, it just entirely defeats the point! However, you won’t find this with the Mopar! They have plating from trivalent metal meaning that there is super corrosion prevention.

Pros

• Excellent price.
• Better engine response.
• Better feeling of speed

Cons

• Gaps are slightly off according to some reviewers.

What Are the Signs of Bad Spark Plugs?

Spark plugs play an essential role in getting your car started. The spark plugs in your car engine are in charge of creating the electricity that is needed to ignite the fuel-air mixture in the combustion engine, which in turn starts your car. Spark plugs in a Hemi engine will need changing approximately every 10 years or 100,000 miles, whichever comes first.

If you notice you are having issues starting your car, the spark plugs may be to blame. Here is a list of bad spark plug symptoms, if you notice any of these problems you likely need to get new spark plugs fitted as soon as possible.

Engine Misfires

If you notice your engine is misfiring and making a ‘popping’ sound, this could be due to one or more worn-out spark plugs. Engine misfires can send raw fuel to the exhaust and in time this will damage the catalytic converter.

Rough Idling

When your engine is idling, if you notice a rattling or knocking sound or feel like the engine is ‘jumpy’, this may be because the spark plugs are old and it is time to fit a new set.

The Car Won’t Start

Spark plugs create the electricity needed in the engine to start the car. While many drivers automatically assume the battery is flat or the starter motor is faulty when they experience failed ignition, it may well be the spark plugs causing all the problems.

The Check Engine Light Is On

A check engine light should never be ignored and it is important you take your car to the mechanic for diagnostic tests to be run. However, if your check engine light is on it may be because one or more of the engine spark plugs are worn or clogged.

Poor Fuel Economy

Getting through gas quicker than usual? It might be because the spark plugs need replacing. As the spark plugs create the electricity needed to ignite the fuel-air mix in the engine, if they are worn out, the engine will need to take over the work. When this happens, the engine will be working harder, using up more fuel and causing you to visit the gas station way more often than you would like.

Loud Noises While Driving

As well as creating noisy idling if one or more spark plugs need replacing your car will be making a loud rattling sound while you are driving. When a clogged spark plug is stopping one cylinder from working effectively, the other cylinders will need to work harder and this can lead to strange sounds coming from the engine.

Loss of Power

Old and worn-out spark plugs can not effectively create the required spark of electricity to ignite the air and fuel inside the combustion chamber. When you accelerate, more fuel needs to be used and an old spark plug may not work quickly enough to keep up with the demand. When this happens, you may notice it is taking longer to accelerate and you are not achieving the same power output as usual.

Conclusion

The 5.7 Hemi V8 engine has 8 cylinders and needs 16 spark plugs to function correctly. If you are noticing misfires, and poor fuel economy, and are having difficulty starting your vehicle, it may be time for some new spark plugs.

In this article, we have listed the 10 best spark plugs for a 5.7 Hemi engine our top pick is they offer the complete kit and are suitable for a wide range of vehicles.

Replacing the spark plugs in your Hemi engine is something you can do yourself at your or have a professional do the job for you. With fresh spark plugs in your engine, you should have no trouble getting your car going and enjoying a smooth and easy drive again.

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