best spark plugs for 5.7 Hemi and wires

Spark plugs are essential to engine ignition, meaning your car may not start without them. However, like any other part, ignition plugs become worn out over time and require replacing.

If you drive a 5.7l Hemi-powered Dodge, you will need to find the best spark plugs for 5.7 hemi. There are many different options available for this engine type, and finding the best can be challenging.

To make your work a little bit easier, we have prepared a comprehensive list of the best spark plugs as well as the best spark plug wires for 5.7 hemi. Top on our list is the Bosch Automotive Double Platinum spark Plug, the best spark plugs for the 2012 dodge ram hemi. Its superior anti-seize and corrosion feature gives it an edge over the competition.

Second on the list is the Set of 16 Chrysler Jeep Dodge Ram 5.7 Liter HEMI NKG spark Plugs Mopar.

While these two top our lists, the other eight all have something to offer.

The right spark Plugs for Your 5.7 Hemi

Chrysler recommends replacing your plugs after 30,000 miles. So which would be the recommended spark plugs for dodge ram 1500 5.7 hemi? While iridium and platinum plugs are known for longevity, they are usually not easy to install.

Nickel and copper plugs offer a mileage of about 30,000 miles and would be a good fit for the 5.7 hemi.

When should you change your spark plugs?

While 30,000 miles is the recommended mileage for changing your plugs, several signs will indicate when it’s time. These signs are;

Engine misfiring frequently

When spark plugs become worn out or corroded, they no longer can transmit enough electricity. This means they are not able to create plugs. This translates to an engine misfire. Thus if you experience frequent engine misfires, it may be time to replace the plugs.

Rough idling of the engine

More often, you will hear rattling or knocking noises from your engine. Sometimes these noises are so loud that it’s hard to ignore. When you hear such kinds of noises from your engine, it is time to replace the plugs.

Difficulty starting the vehicle

When it becomes difficult to start your vehicle, it may be because of worn-out or clogged plugs. The reason being there are not enough ignitions to ignite the engine. This will be a good sign that it is time to replace the plugs.

Low acceleration, Worn out, or faulty plugs will be incapable of igniting and maintaining the combustion chamber’s fuel-air combustion. This will translate to your car struggling to accelerate. Thus if your vehicle has problems accelerating, it may be time to buy new spark plugs.

Decreased mileage

If you find yourself going to the gas station more frequently, it may be a sign of faulty or worn-out spark plugs. The latter will lead to unnecessary and wasteful usage of fuel. This will, in turn, lead to your engine consuming more fuel than normal. Replacing the spark plug can be the solution to your fuel efficiency problem.

Will replacing spark plugs improve performance?

Yes, spark plugs are integral to the performance of your car. They are responsible for igniting the fuel and air mixture that powers the combustion chamber and, in turn, your vehicle. Replacing your old spark plugs with new ones will translate to an improvement in performance.

Replacing spark plugs on a 5.7 hemi

Replacing the spark plug of a 5.7 Hemi engine isn’t complicated. However, it is a time-consuming process that requires caution. And sometimes it is better to leave to the pros. Nonetheless, now how to change ignition plugs is something we recommend.

Step One: Set The Right Gap

The vehicle manual will have instructions and information on which is the right gap distance. Some plugs come with a pre-gap. But there is no pre-gap use of a gapping tool. Check the gap before installing to ensure it is correct.

Step Two: Install The New Plug By Hand

Take care when doing this, and press the washer against the mounting surface. To snug, the replacements make two full turns in a clockwise direction. Use a socket wrench to turn the plugs in a clockwise direction further.

Step Three: Replacing Wire and Coil

Next, replace the wire connectors and ignition coils or wire boots. Typically plastic boots will be easier to replace than rubber ones. You can use di-electric grease to replace rubber boots.

Step Four: Repeat

Repeat this process for each plug. If you are installing all-new plugs, you will have to install all 16 plugs.

The Best Spark Plugs for the 5.7 Hemi

Bosch Automotive Double Platinum spark Plug

If you are looking for the best spark plugs for the 2012 jeep grand Cherokee 5.7 hemi, then this Bosch Double platinum spark plug is it. This will also fit the Chrysler Aspen 300 and the Dodge Challenger Charger Durango.

Platinum construction

Platinum plugs come in second in terms of longevity after iridium plugs. Platinum plugs offer you about 55 to 75,000 miles. This means the chances of you having to replace these Bosch spark plugs frequently are minimal.

Copper core

The core of this plug is made of copper. Copper is an excellent conductor of heat. As such, you should expect better heat transfer with this plug.

Nickel-plated shell

On the other hand, the shell is made of nickel. Furthermore, it featured rolled threads. This means you do not need to apply anti-seize when installing this plug. As such, the chances of this plug getting stuck are minimal.

Set of 16 Chrysler Jeep Dodge Ram 5.7 Liter HEMI NKG spark Plugs Mopar

If you own a Chrysler Dodge ram, then these NKG spark plugs from Mopar should fit perfectly. They are OEM and are designed to work on any Dodge Ram from 2009 to 2013. And are probably the best spark plugs for 2012 dodge ram hemi and dodge challenger on the list.

A set of 16 plugs

The first thing you notice after purchasing these plugs is the four packs. These 4 packs each contain 4 plugs bringing the total to 16. This gives you enough for your truck’s 16 engine cylinders.

Nickel construction

These spark plugs are made of nickel, which is known for retaining excellent conductivity. The solid nickel construction helps amplify the input voltage. These plugs should give you good mileage before needing to be replaced.

Ease of installation

These are OEM plugs and should fit your 5.7l hemi without any problems. Additionally, installing them isn’t a hassle and will only take a few minutes.

APDTY Tune-Up Kit Includes 16 OEM spark Plugs

There is a lot we like about the APDTY Tune-up ki with 16 OEM plugs, with our main disappointment being that they only work on 2003-2005 Dodge Ram pickups. So what exactly do you get?

Inclusive package

You get a package that includes 16 OEM spark plugs. Also, you get eight igniting ignition plug wires. Also, you will get 8 coils on plugging boots. This gives you all the tools you need to assess your system.

16 OEM plugs

Similar to the Mopar package, you also get a set of 16 plugs in this APDTY package. These will be enough for your 5.7L Hemi. Also, you get this package at a more affordable price tag compared to other similar products.

Copper construction

Copper is another excellent metal used to make plugs. It offers excellent conductivity. You should expect about 20,000 miles from these plugs.

Champion Copper Plus 570 ignition Plug (Carton of 1)

The Champion copper plus 570 ignition plug comes as a single plug. While this may disappoint some people, it does offer excellent performance. Here is what you get with this plug.

Copper construction

As its name suggests, this plug is made from copper. It may not be as long-lasting as iridium, but it offers excellent conductivity. Also, Chrysler recommends changing the 5.7l Hemi after 30 miles. This copper plug will have no trouble lasting you that long.


Corrosion is a major cause of stuck spark plugs. Thankfully, this plug features a patented ultra seal that protects it from corrosion. This improves the plug’s durability.

Ease of installation

Anyone who has installed this plugin in their engine will tell you that they are easy to install. It will take you only a few minutes to install.

ACDelco 41-993 Professional Iridium spark plug

Iridium ignition plugs are known to be of high quality, and the ACDelco 41-993 is no exception. This plug is built to last and is a favorite of many people.

Iridium construction

Iridium spark plugs last longer than copper and nickel plugs. As such, this ignition plug should last you longer than most in the market. It offers smooth performance and efficiency in the engine ignition process.

Fine wire electrode

The fine wire electrode is also made from iridium. This helps burn away carbon as it builds upon the tip of the plug. This goes a long way in preventing the plugs from getting stuck.

Suppressor seal

The seal on this plug helps block radio frequencies. The latter can interfere with the electronics of the car, spark plugs included. Thus having this suppressor seal helps protect the plugs from radio frequencies.

Autolite APP5325-4PK Double Platinum spark Plug

If you are looking for something a bit more affordable, then the Autolite APP5325-4pk spark plug might be the best option. These plugs come in a set of 4.

Platinum tip

Platinum is a metal known for its corrosion-resistant properties. The tips of these plugs are made from metal, ensuring zero-gap erosion.

Copper core

Similar to other pricier options, this one has a copper core. This ensures a better heat transfer, which translates to faster engine ignition.


Compared to other options, these plugs are relatively cheap. If you are on a tight budget, these are the best spark plugs for the 2012 dodge ram hemi.

NGK (4469) LFR5AIX-11 Iridium IX Ignition Plug

Offered as a set of 8 ignition plugs, the NGK LFR5AIX-11 iridium spark plugs provide excellent performance. These plugs are compatible with several different cars, including the 2010 Dodge RAM 1500 Hemi.

Iridium construction

If you want longevity, then go for iridium plugs. The latter can give you 75,000 to 80,000 miles of range before requiring replacing. These NGK plugs will thus offer you the kind of longevity you may not get from copper or nickel alloy plugs.

Compatible with different cars

These plugs will fit into a 2010 dodge ram 1500 the same way they will fit into a 2012 Nissan Armada. As such, these plugs will fit into a wide array of vehicle models.

Eight plugs

The package you receive comes with 8 plugs. We would have loved a 16 plug package, but for the price, this was reasonable. They are cheaper than most 16 plugs packages.

Fram Autolite AP5263 Platinum Ignition Plug

The Fram Autolite AP5263 comes as a solitary ignition plug. And in terms of performance, this ignition plug does deliver great value for money. Here is what you can expect.

Copper core

A copper core improves heat transfer, which translates to quicker starts. This also helps improve your car’s fuel efficiency and provides smooth acceleration. Furthermore, the built-in resistor reduces interferences from the radiofrequency.

Platinum tip

The tip of this plug is made of platinum, which helps prevent gap erosion. It also has a necked-down center electrode. The latter helps with quicker firing and requires less voltage.

Double platinum

With the plug’s platinum-to-platinum firing, there is virtually no gap erosion. Also, the risk of a misfire is significantly reduced. There is also the benefit of improved durability.

Best spark Plug Wires for 5.7 Hemi

JDMSPEED New 10.5mm Ignition Plug Wire

The JDMSpeed 10.5mm ignition plug wire package comes with a set of 10 wires. This package has a relatively affordable price tag, and at this price point they are the best spark plug wires for 5.7 hemi.

It fits a wide range of cars

These ignition plug wires can fit into a wide variety of vehicle types. This includes Chevrolets, Chryslers, BBC, and SBC.

Solid copper core

As the name suggests, these are 10.5mm wires. The latter includes an insulator to protect against any potential electrical interference. Additionally, the solid copper core guarantees a reliable and fast ignition.

High-quality construction

The exterior of the wires has a metallic finish. This helps with durability and means your wires will last long.

MSD 35599 Red 8.5mm Super Conductor Ignition Red Plug Wire

Another plug wire that is offered at a reasonable price tag is the MSD 35599 Red superconductor wire. This has the characteristics of a premium after-market plug wire.

Copper alloy conductor

The conductor of this wire is made of copper alloy. This translates to a resistance value of less than 50 ohms per foot. This is great for a superior ignition.

Exterior protection

A protective compound covers the exterior of the wire. The terminals, on the other hand, have dual crimp tabs. This ensures a high resistance to abrasion and heat to protect the cables.

Choosing the best plugs for the 5.7 hemi

Choosing an appropriate ignition plug for your 5.7 Hemi car is not always easy. There are plenty of options to choose from. So what factors should consider when searching for the best performance ignition plugs for 5.7 hemi?

Check Engine Compatibility

Ignition plugs are designed to fit specific engines. The spark plug wire for 5.7 vortec may not fit with the 5.7 hemi. Thus, when searching for the best spark plugs for the 5.7 Hemi charger, check for engine compatibility. This will tell you if a particular plug can fit into the 5.7 Hemi engine or not. It goes without saying that you should only pick plugs designed to fit the 5.7 hemi.

Construction: Which Material is Best for longevity?

Ignition plugs are made from iridium, platinum, nickel, or copper. Copper and nickel plugs are more popular. However, iridium and platinum plugs offer longevity. So if you want to go for longer before replacing your plugs, go for iridium or platinum plugs.

However, copper and nickel plugs can be a good choice since the general rule of thumb is that you should replace the plugs after 30,000 miles. Nonetheless, the best spark plugs for 2012 dodge ram hemi are typically made of either iridium or platinum.

Ease of installation

The design of a plug will be instrumental in how easy it is to install. OEM plugs are generally easier to install. Thus they are a good choice.

Pre-gapped vs. not gapped

Pre-gapped ignition plugs are always a better choice. The reason being they are specifically tuned for a specific car model. This makes them easier to install. However, the gap can change and require some adjustments when installing.

Nonetheless, the recommended spark plugs for dodge ram 1500 5.7 hemi are usually pre-gapped to fit the 5.7 hemi.

Corrosion and anti-seize protection

When ignition plugs get corroded or seized, they become inefficient. Thus it is essential to prevent this. The best spark plugs for 5.7 Hemi ram typically have some kind of protection against corrosion and seizing.

Some such as the Bosch plug have a nickel-plated shell that does not require an anti-seize coating.

Number of plugs in the package

Different engines require different numbers of plugs. The 5.7 hemi requires 16 plugs. Thus to save on costs, you may want to consider an ignition plug package with 16 plugs.

Frequently asked questions

How many plugs do the 5.7 hemi have?

The 5.7 Hemi engine has a total of 16 plugs, two for each of the 8 engine cylinders.

Do all 5.7 Hemi engines have 16 plugs?

Not really; there are some newer versions of the engine that do not have 16 plugs.

Iridium vs. platinum plugs, which are better?

In terms of longevity, iridium plugs last longer than platinum plugs and will serve you for up to 80,000 miles and are thus the better of the two. And the best spark plugs for 2014 ram 1500 hemi are usually made of iridium.

How many miles do ignition plugs?

The recommended mileage for changing ignition plugs is 30,000 miles. However, some options, especially iridium plugs, can last for up to 100,000 miles.

Why does the 5.7 Hemi engine require 16 plugs?

The hemi is a V8 engine, meaning it has 8 cylinders. Each of these 8 requires two ignition plugs; hence, the engine requires 16 plugs.

What are some of the common signs of a faulty plug?

The most common signs include difficulty starting a vehicle, frequent misfires, rattling noise coming from the engine, poor acceleration, and poor fuel economy.


The ignition plug plays an essential part in the proper functioning of your engine. Thus if you want your car to perform optimally, you need to get the right set of ignition plugs. The best ignition plugs for 5.7 Hemi should last you for 30,000 miles or longer.

Last Updated on February 2, 2023 by Rifen

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