7 Best Spark Plugs for 5.7 Hemi [Reviews & Guide]

Spark plug causes the igniting spark to start fuel burning. Only the perfect ones can induce overall betterment in engine performance.

As it happens, it’s no different with 5.7 Hemi systems. You’ll have to purchase & install the recommended plugs all along.

But the overwhelming number of choices can mislead you for sure. It’s really important to pay attention while investing in one.

Why you just skip all the fancy searches or verbose reviews? Check out our narrowed down list of best spark plugs of 5.7 Hemi.

Before digging into the details, let’s have a look at the comparison right below.

Best Spark Plugs for 5.7 Hemi-Comparisons

ProductMaterialPack QuantityCompatibilityPrice
Mopar Spark PlugsNickel162009 – 2013
Bosch 8162 Spark Plug Platinum42009 – 2018
ACDelco 41-993 Spark PlugIridium41991 – 2002
Champion RE14MCC4 (570) Spark PlugCopper12002 – 2010
Autolite AP5263-4PK Spark PlugPlatinum42002 – 2008
Champion 3570 (3570) Spark PlugPlatinum11995 – 2005
APDTY Spark PlugsCopper162003 – 2005

Best Spark Plugs for 5.7 Hemi- Reviews

You got a quick comparison to have some insight. But making the purchase requires more details. Then let’s get down to the best spark plugs for 5.7 Hemi reviews. Start scrolling to explore our picks one by one.

1.Mopar Chrysler Jeep Dodge Ram 5.7 Liter HEMI

Mopar Chrysler Jeep Dodge Ram 5.7 Liter HEMIIncredibly supportive design imparts an unsurpassed boost for your engine.

When it gets to spark plug, Mopar doesn’t come first. But it brings in one great option for 5.7L systems.

It’s one authentic best spark plug for Dodge Ram Hemi. The pack contains 16 plugs to serve your purpose.

Features & Benefits

Sturdy Nickel Structure

There was the time for 5.7 Hemi with nickel plugs all over. And right there, you would need the plugs. Solid nickel retains excellent conductivity. It amplifies the input voltage to a sufficient extent.

Extended Road Mileage

The nickel is ready to support the system. It improves engine efficiency from startup. In fact, the plugs can withstand high stress. Therefore, it reduces fuel consumption over better on-road mileage.

Premium Applicability

Nickels aren’t currently in practice, resulted in limited usability. Most of the 2009 – 2013 models feature the sparking gear. You’ll have to settle down for the 16-piece set for the vehicles.

Pros

  • Superior voltage amplification
  • Quality nickel, high conductivity
  • Reduction in fuel consumption
  • Simple installation within secs

Cons

  • Somewhat narrow usability

2.Bosch 8162 Double Platinum Spark Plug

Bosch 8162 Double Platinum Spark PlugLet the engine start with fresh life over a reliable ignition.

Bosch itself is one popular tool brand all over the world. And Bosch Automotive here comes with the best performance spark plugs for 5.7 Hemi for you.

It promises maximum output, from construction to serviceability. The engine receives a safe spark towards a cold startup.

Features & Benefits

Dual Platinum Frame

The plug features a platinum body rather than traditional copper. And its premium double platinum covers the ground electrode & firing pin. Therefore, it extends engine functionality from the core.

Laser Welding Durability

Its construction comes with a continuous 360° laser welding. Not to mention, the feature allows its built-in firing pin to fuse perfectly. You’re sure to receive an enhanced service lifespan there.

Fine Wire Designation

The top-quality design promotes output efficiency from the beginning. The design includes a fine wire to fit the system requirement. It results in improved ignitability along with voltage amplification.

Pros

  • Easily fusible firing pin
  • Dual platinum, 3x longevity
  • Consistent laser welding
  • Original part fits perfectly

Cons

  • Weak porcelain body

3.ACDelco 41-993 Professional Iridium Spark Plug

ACDelco 41-993 Professional Iridium Spark PlugGet the old engines functioning like a modern one right here.

ACDelco is one premium name in the vehicle part industry. And its best spark plugs for Dodge Ram 1500 guarantee a boost for the 5.7L engine output.

It’s hard to manage high-end options for conventional vehicular engines. That’s why you can count on the chosen plug for older systems.

Features & Benefits

Premium Iridium Body

Just like the old versions, the plug comes with iridium construction. It triggers better idle stability for smooth output. A pretty stable action initiates faster acceleration following a secure startup.

Spark Energy Retention

There comes a unique but effective suppressor seal integration. It blocks harmful radio frequency along with combustion leakage. As a result, generated sparking energy gets retained to encourage electrode life.

Improved Fuel Economy

The built-in electrode features fine wiring to help with fuel economy. Its effective action immediately starts to burn carbon deposits. Improved ignition causes less fuel consumption to lower the cost.

Pros

  • Protection for interior parts
  • Less carbon deposit buildup
  • Almost no combustion leak
  • Quick acceleration in speed

Cons

  • Not for modern engines

4.Champion RE14MCC4 (570) Copper Plus Replacement Spark Plug

Champion RE14MCC4 (570) Copper Plus Replacement Spark PlugInduce more power for the engine regarding a convenient performance.

Champion is indeed a reliable brand for older engine systems. Its exclusive design initiates further efficiency for the output.

The best spark plugs for Dodge Magnum are ready to fit the system with an eye blink. Unlike the other ones, the pack contains only one singular unit.

Features & Benefits

Heat Resisting Alloy

The structural system features a premium alloy to withstand the heat. Top-notch platinum parts ensure maximum voltage amplification. In fact, the construction includes a fine wire & one ground electrode.

Sharper Sparking Ability

Its standard dual platinum system delivers encourages vehicle power. The frame solely focuses on safe, fast & dependable response. A sharp sparking capability prevents unnecessary fuel burning.

Stable Operation

Replaced plugs let the system reach optimum temperature with ease. Quick temperature rise results in immediate engine startup. And the temp gets stable thereafter under all types of engine loads.

Pros

  • Durable platinum structure
  • Extended startup power
  • Very easy plug installation
  • Stable inner temperature

Cons

  • Only 1 unit in pack

5.Autolite AP5263-4PK Platinum Spark Plug

Autolite AP5263-4PK Platinum Spark PlugDurability & performance go hand in hand with the premium spark plug.

Autolite brings in something out of the ordinary choices. Its modified design & improved functionality will give a stunning output.

Changing the old design imparts a solid outlook here. But the best spark plugs for 5.7 Hemi Ram output remains the same from top to bottom.

Features & Benefits

Premium Metal Alloy

The major structural design basically features one particular metal. But you’ll get a superior metal alloy right here. It contains a significant amount of conductive copper against the main platinum body.

Sticky Exterior Coating

The old models include a black oxide coat, prone to fading away. Current versions come with steady nickel plating on the outside. The cover remains durable enough to support the inner construction.

Extra Attachments

You’ll require nuts for attaching the gasket & terminal. The previous version lacks the nut & calls for additional purchase. Improved one requires one buy, thanks to the attached gasket & terminal nuts.

Pros

  • Improvised alloy design
  • Excellent metal durability
  • No metal type branding
  • Rib stripes not necessary

Cons

  • No built-in gapping

6.Champion 3570 (3570) Platinum Power Spark Plug

Champion 3570 (3570) Platinum Power Spark PlugGet the best of spark plug for your precious 5.7L engine system.

We just have another option from Champion in the list. Unlike the previous RE14MCC4, 3570 comes with some unique features.

The best spark plugs for 5.7 Hemi Charger enable superb output for compatible systems. Despite all the adverse conditions, you’ll have a smooth running.

Features & Benefits

Secure Temp Operation

The core structure features an enduring metal alloy. Combined action leads to outstanding heat tolerance inside. Therefore, the mechanism can reach optimum sparking temperature in no time.

Sharp Sparking Electrode

Both the included electrodes come with an exclusive functional design. V-trimmed ground electrode comes against the central electrode with a thin wire. And they create a sharp focus on startup sparks.

Constant Gap Setting

For the central electrode, there is one platinum tip. The portion is less prone to wear & tear, in comparison to standard plugs. It even helps with the reduction in inner spark scattering.

Pros

  • High-quality platinum frame
  • Lowering of scattered spark
  • Stable operating temperature
  • Durable electrode structures

Cons

  • Slight packaging issue

7.APDTY Tune Up Kit Includes 16 OEM Spark Plugs

APDTY Tune Up Kit Includes 16 OEM Spark PlugsAll-in-one set containing wires & boots to serve your Hemi engine.

We’re down to the very last option of our list. But even the last option promises maximized satisfaction from every aspect.

Despite its low usability, the best spark plugs for 5.7 Hemi Challenge gives you what you want. Both performance & efficiency will reach the peak from the start.

Features & Benefits

Convenient Package

The kit contains a total of 32 parts to assess your system. There come 16 spark plugs, meeting OEM standards. Again, you’ll receive 8 igniting spark plug wires against 8 coil-on plugging boots.

Durable Framework

Every single piece includes definite, dependable materials. You can replace the major ignition part & enjoy a smooth driving. The conventional design with modern tech results in enduring performance.

Satisfactory Fitment

The basic fitment range is pretty confined with the plug. It’s suitable for 2003 – 2005 Dodge Ram Pickups only. Furthermore, you can use the replacement kit for 2004 – 2005 Dodge Durango as well.

Pros

  • Top-notch copper sparking plugs
  • Perfect tuning up engine package
  • Replacement for ignition facility
  • Denso springs for included boots

Cons

  • Quite narrow usability

How to Choose Best Spark Plugs for 5.7 Hemi?

Choosing the right spark plug is essential for getting the best performance. It’s not easy with lots of available choices around. But you better stick with certain factors to find the best spark plugs for 5.7 Hemi.

Engine Compatibility

The foremost task for you is to find the manufacturer’s recommendation. It’s all about your car’s preference rather than your personal favorites.

Each vehicle engine is suitable for only a limited number of plugs. Check out the manual to determine the recommended type along with other specs.

Plug Construction

Almost all the spark plugs look more or less similar from outside. But there are certain differences based on the core material. You’re likely to find copper/nickel, iridium, platinum & double platinum.

Lots of users get confused over the options. It raises the obvious question; which is better – Iridium, Copper, or Platinum spark plugs?

Copper/Nickel Plugs: It’s indeed the most popular with higher conductivity & temp stability. But it lacks the necessary strength to serve long enough. The type is particularly useful for older engine systems.

Iridium Plugs: The intended type is current on-trend by the manufacturer itself. A somewhat smaller electrode on the center can induce further longevity than others. It requires less voltage amplification & less operational temp.

Platinum Plugs: The metal itself is pretty durable to last sufficiently long. High temp resistance lets it withstand immense heat stress. It also helps to prevent unwanted deposits or buildup occurrences.

Double Platinum Plugs: It’s more like the singular platinum plugs. But the basic difference lies with the electrode. Aside from the central electrode, you’ll have another ground electrode. Combined action tends to give better longevity.

The ultimate choice depends on vehicle specifications. It means unless your engine is compatible with the particular type, you can’t choose it.

Replacement Ease

Sometimes, things get tricky with a complex mechanism or unorthodox installation. You’ll have to pick original part replacements first.

Right size & shape play a large part right there. Don’t forget to match the compatible model number. Consult a pro mechanic to avoid uncertainty.

Pack Quantity

One underrated fact concerns with pack quantity. Most 5.7 Hemi comes with a 16-plug system. That’s where you’ll need the pack quantity.

Always try to replace the whole set to get the best result. You can get the best spark plugs for Dodge Ram 1500 5.7 Hemi available with 16 units at once. You may also come in contact with a singular unit pack.

Which Type of Spark Plugs Do You Need for Your 5.7 Hemi?

Still at a loss about what are the best spark plugs for 5.7 Hemi.

It may not seem enough to break down the types. Several users tend to install different ones to replace the previous type. But you better get ready to go through some real problems by doing so.

What matters in the end, is the manufacturer’s recommendation. In fact, you’ll have to settle down for the particular type. If it’s copper or nickel, there’s no simple way to install platinum or iridium.

You may eagerly want to get something new to upgrade the system. Right there, you may think of replacing the whole engine system. Consulting a pro mechanic is a must before pulling off the stunt.

When and How Often to Change Spark Plugs 5.7 Hemi?

There comes a time when the system calls for a change in its plugs. Certain symptoms start to appear as the plugs get close to the end. You’ll have to go for replacement with the recommended spark plugs for Dodge Ram 1500 5.7 Hemi.

If the following signs bother you, it’s probably the time to change the plugs.

Frequent Engine Misfire

All the vehicle owners expect the system to run smoothly. But bad or failed plugs can never let it happen. The interior combustion process becomes hampered to affect functionality. In fact, it causes the engine to hesitate on the run. Misfiring tends to occur every now & then.

Rougher Idling

Proper engine performance comes with steady sound & smooth vibration. But faulty plugs initiate abrupt, random & irregular vibration. Even the sound may seem awkward & uncomfortable. You’ll notice its occurrence with a rough & harsh resultant while idling.

Difficult Startup

You’re likely to have no trouble with a functioning plug. But problems start to appear when the plug can’t take the load anymore. Foul plugs can’t generate the necessary ignition spark in the system. The startup becomes difficult, requiring a good number of annoying attempts.

Low Acceleration

It’s easy to heat the system rather quickly over good plugs. But losing the get-up & go output is one major symptom. The engine can’t produce & regulate the combustion constantly. It directly triggers a decline in fuel burning. That’s where speed increase gets slow rather than usual.

Reduced Mileage

Another peculiar sign concerns with fuel economy. Poor plug action forces you to trip the gas station more frequently. Aside from more startup burning, the fuel gets low over unnecessary & wasteful usage. A sudden rise in fuel consumption is one downside of faulty action.

Of course, you’ll need to make the change after a certain driving interval. Manufacturers recommend a more or less 100000 miles run between the replacements. You may get some extra miles over good care & maintenance. But it’s better to prepare yourself crossing near 100000 miles.

How to Replace Spark Plugs on 5.7 Hemi?

Changing the spark plug is a simple but somewhat time-consuming process. Unless you know the interior mechanism, it’s better to leave the change for pros. It’s indeed one sensitive & essential part of the engine. So, you’ll have to remain cautious while installing plugs by yourself.

But you better know how to change spark plugs on Dodge Ram 1500 Hemi to handle on-road issues.

Step 1:

Try to set the necessary gap on replacement plugs before installation. Go through the vehicle manual to know the gap distance. You may require a gapping tool if there’s no pre-gap. Double-check the gap regarding a corrected setup. Utilize one feeler gauge or gap gauge to estimate the distance.

Step 2:

Install the newer plugs by hand with care. Gently press the washer against its mounting surface. Don’t forget to make two full turns in the clockwise direction to snug all the replacements. Again, turn the plugs clockwise using a socket wrench with the built-in extension socket.

Step 3:

Now start replacing the wire connector along with ignition coil or wire boot. Not to mention, ease of removal in this regard particularly depends on boot material. Plastic boots generally click into the position easily. But rubber boots are likely to require an additional coat of di-electric grease.

Step 4:

Repeat the installation from head to toe for seating each plug. Try to take out visible deposits or buildups before making the replacement. Don’t ever over tighten the screws in order to prevent sudden connectivity failure. You may think of consulting pro mechanics for further assistance.

Frequently Asked Questions (FAQs)

Question: How many spark plugs do a 5.7 Hemi have?

Answer: 5.7 Hemi came a long way in the business. The initial models mostly feature a dual V8 system, requiring a total of 16 plugs. But the number is likely to vary depending on modern systems.

Question: Does all 5.7 Hemi have 16 spark plugs?

Answer: The answer is yes & no. Previous versions include 16 spark plugs towards dual combustion. But increased engine performance over the years, some vehicles don’t need 16 plugs all along.

Question: Which is better – iridium or platinum spark plugs?

Answer: Iridium offers a better melting point, greater strength & further hardness than platinum. But it’s prone to experience wear on frequent use. You’ll have to go through the manual to get the required material.

Question: How long do spark plugs last?

Answer: The standard longevity or service interval is mostly 100000 miles. It’s the same with platinum or iridium gears. There are some specific models to have 120000 miles of interval.

Question: Why does the 5.7 Hemi have 16 spark plugs?

Answer: 5.7 Hemi mostly features a V8 engine configuration. Therefore, there are 8 cylinders in total. And each cylinder needs 2 spark plugs. So, the total plug number is 16 for any V8 Hemi system.

Question: What are the symptoms of bad spark plugs?

Answer: Any physical deficiency leads to some noticeable problems ahead of failure. Likewise, there are definite symptoms of bad spark plugs. It may include – hard startup, engine misfire, rough idling, poor acceleration, increased fuel cost, etc.

Conclusion

Engine functionality largely depends on the quality of spark plugs. You better not mess with its choice, no matter what. And that’s where our article should get you the best spark plugs for Dodge Ram 1500 5.7 Hemi available. We hope to give everything necessary for a successful purchase.

It’s difficult to pick when you have all the bests in hand. But still, we would like you to consider Mopar spark plugs 5.7 Hemi. Whether it’s Jeep, Dodge, Ram, or Hemi – the plug remains ready to serve. It’s definitely worth your investment from every possible aspect.

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