Top 10 Best Spark Plugs For 5.7 L Hemi In 2022
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Are you 5.7 Hemi users and willing to replace the spark plug but don’t know what is the best spark plug for 5.7 l Hemi? Well be relaxed! We have brought 9 best spark plug for the 5.7 Hemi review as well as the following information:
- How to choose the best spark plug for 5.7 l Hemi
- When is the ideal time to replace 5.7 Hemi?
- How to replace, step by step guide
- And much more!
Quick Comparison
| Image | Product | Key Features | Price |
|---|---|---|---|
 | 1. NGK 5464 Iridium IX Spark Plug | ● Core Material Iridium. ● Item Weight 1.6 ounces. ● Product Dimensions 3.4 x 0.8 x 0.7 inches. ● 0.6-millimeter laser welded fine Iridium tip. | Check Price |
 | 2. Mopar NKG Spark Plugs Set for 5.7 Liter HEMI | ● Item Weight 2 pounds. ● Product Dimensions 4.2 x 4 x 3.7 inches. ● 16 set pack. ● Neat packaging. | Check Price |
 | 3. Bosch Automotive Double Platinum Spark Plug | ● 3X Longer Life. ● Material Double Platinum. ● Item Weight 7.8 ounces. ● Product Dimensions 4.02 x 1.06 x 0.94 inches. | Check Price |
 | 4. Autolite AP5325 Platinum Spark Plug | ● Material Platinum. ● 4 pack set. ● Item Weight 8 ounces. ● Product Dimensions 3.38 x 1 x 1 inches. | Check Price |
 | 5. ACDelco Professional Iridium Spark Plug | ● Material Iridium. ● 4 pack set. ● Item Weight 12.8 ounces. ● Package Dimensions 6.4 x 3.4 x 0.9 inches. | Check Price |
Best Spark Plugs For 5.7 L Hemi
1. NGK 5464 Iridium IX Spark Plug
The first pick for the best spark plugs for 5.7L Hemi in our list is NGK 5464 BKR5EIX spark plug. It is specially designed for the performance enthusiast. This Iridium IX will offer extreme ignitability with improved throttle response.
On the other hand, the manufacturer constructs the spark plug with a 0.6-millimeter laser welded fine Iridium tip so it can ensure consistently stable and high durability spark for 5.7 l Hemi. Besides, it designs with a tapered ground electrode to minimize the electrical quenching effect.
Thanks to its multi-functional longer insulator nose that can effectively prevent fouling. At the same time, its corrugated ribs on the insulator will prevent flashover. If you are still confused about its quality, the spark plugs Iridium alloy includes an extremely high melting point to offer high durability to heat and electrical wear.
The entire feature makes it suitable for today’s high-performance engines. So at an affordable price, this NGK 5464 BKR5EIX spark plug will be the right option to upgrade the 5.7 l Hemi.
2. Mopar NKG Spark Plugs Set for 5.7 Liter HEMI
While we are talking about 5.7 l Hemi we can’t avoid the Mopar spark plug for its quality and long-lasting service. It will be a suitable option to consider if you want a spark plug to upgrade your engine.
The produces offer it in a neat package. Besides they offer exact part numbers to keep you free from any confusion. The key feature of this spark plug is it will give you a better mileage cover.
At the same time, the MPG will surely improve after installing this spark plug. It’s a factory type lug that is ready to perform amazingly. However, it’s a bit pricy but you will find in the worth of money after adding in the vehicle. Just check that it suits your vehicle before making a final decision.
3. Bosch Automotive Double Platinum Spark Plug
This Bosch Automotive Double Platinum Spark Plug will be the right addition for high-performance vehicles. Even it is ready to satisfy you if you have heavy towing demands. Most importantly it will be suitable for boosting the performance of 5.7 Hemi.
After installing these spark plugs, you will discover the car starting quickly. It also improves truck performance as these will respond better. The manufacturer made the spark plug with platinum and iridium so it can be a reliable option to choose from. The feature makes it long-lasting as well.
Most importantly if you consider the price you will find it cheap. So you don’t need to think a second time if you want to replace your spluttering or coughing old spark plugs with this latest Bosch Automotive Double Platinum Spark Plug. With the incredible design, the spark plug will be fit most of the model.
4. Autolite AP5325 Platinum Spark Plug
Another appropriate spark plug for 5.7 hemi in the market is Autolite AP5325 Platinum Spark Plug. It comes with a pack of 4 still available at half of the price if you compare it with other competitors. Apart from these, its center electrode is constructing with platinum material to offer better durability than copper.
Its firing tip is also made from platinum to prevent misfiring. At the same time, the feature will help you to maintain an accurate gapping. To promote a faster start the manufacturer made the spark plug with a great combination of excellent engineering and a smaller diameter. So it offers cleaner combustion, lower voltage demand, and boosts the acceleration in different engines.
On the other hand, it includes a platinum alloy pad to ensure durable and long-lasting service. The heavy-duty steel construction makes its shell maximum tough in the market. Finally, you will have nickel plating that not only improves the durability of the shell but decrease the chances of catching corrosion.
5. ACDelco Professional Iridium Spark Plug
Are you looking for a spark plug for 5.7 l Hemi that will allow you to replace the spark plug without annoying and confusing? Then this ACDelco Professional Iridium Spark Plug can save you. Just consider the gap before making a final decision as it will be essential to install the spark plug properly. However, it is not recommended the gaping you are allowed to use anti-seize.
After installing this high-end spark plug, you will discover the vehicle started running better than ever. It won’t let you down when the spotlights show up! The best part is it can be suitably installed in the Hemi 5.7. Thanks to its iridium tip that allows the spark plug to work faster than another spark plug in the market.
The manufacturer designs it in such an incredible way that can last for a long. If you compare the price with the quality you fill find it is surprisingly low. The highlight feature of this spark plug is it includes a piece of suppressor seal so it can block the frequencies. With its long electrode life, the spark plug can serve the engine safely.
6. Champion Copper Plus 570 Spark Plug for 5.7 Hemi
The next on our list is Champion Copper Plus Spark Plug that is completely worth its name tag. Besides, it is made with copper that makes it high quality in the market. Even if you compare it with the price, still it will be considerable for 5.7 l Hemi.
Usually, Hemi 5.7 comes with two plugs in every cylinder that need to replace every 30k miles. It means you have to change the spark plug after a certain period no matter which spark plug you use. In this case, this copper made spark plug can be a money-saving option for your 5.7 Hemi.
However the manufacturer compromise in price but they won’t comprise in the quality as the Champion Copper Plus Spark Plug works great.
After installing this spark plug you have a gap yourself. Besides these are these are anti-corrosion. So you won’t have any face corrosion after getting this spark plug. On the other hand, its design and construction are reliable. If you have an old vehicle and looking for a suitable spark plug, you should get these spark plugs.
7. Autolite AP5263 Platinum Spark Plug For 5.7 L Hemi
If you are looking for the best spark plugs for 5.7 l Hemi that will last for long and will be extremely sturdy let try this Autolite Platinum Spark Plug. It constructs with platinum material so you don’t need to worry about longevity. At the same time, the feature will help you to get extra mileage with heavy-duty performance.
However, it will take up to 50min to install but the process of installation is quite easy. Its seat type is conical comes with a 14mm thread. On the other hand, its electrode tip is also constructed with platinum material. So you will have all over durable and long-lasting spark plugged for your 5.7 Hemi.
To maintain the precise gap the manufacturer includes high nickel alloy in this spark plug. Similarly, the platinum made tip will help you to avoid gap erosion if you run it for longer. As its center electrode fires quicker, so you will have faster acceleration. Finally, the spark plug will improve fuel economy after you have this budget-friendly spark plug.
8. APDTY Tune-Up Kit Spark Plugs For 5.7 L Hemi
If you are a Dodge Ram 1500 5.7 Hemi user and looking for an advanced technology spark plug, then this APDTY Tune-up Kit Spark Plugs will be the right choice option for you. However, it’s a bit pricy but this spark plug is the most loved spark plug on the market for Dodge Ram 1500 5.7 Hemi.
Besides, it is very easy to install even for a beginner. It will allow you to keep the process neat and clean and free you from getting tired of running wires. Although it is very to install it may take several times to set up properly. But after the installation, you will have the perfect fit for high performance.
At the same time, the manufacturer offers this high-quality spark plug at an extremely low cost. If you have a vehicle that runs then adding this spark plug will boost the vehicle’s performance. The best part of this APDTY Tune-up Kit Spark Plugs is it comes with 16 different spark plugs to ensure the right fit easily.
On the other hand, it includes 8 ignition spiral plug wires to allow you to do the work easily.
9. DENSO Iridium TT Spark Plug For Dodge Ram
The last on our list for the best spark plug for 5.7 Hemi is DENSO Iridium TT Spark Plug. It especially designs to save fuel and serve high power. Besides its Iridium TT’s duplicated points will allow the spark plug to make the largest spark explosion and concentration.
Its solid alloy is made with two materials including iridium with rhodium. The material allows the alloy to greatly perform even in the hottest engine temperatures. At the same time, the feature makes the spark plug eligible to generate the smallest diameter center electrode of point four millimeters.
This smaller electrode not only reduces heat quenching bringing less interference but maximizes volley potential. The spark plug is also able to offer the right scheme of fuel efficiency, faster acceleration, and quicker starts smoother idling. Finally within low price this DENSO Iridium TT Spark Plug can be an ideal choice for 5.7 l Hemi.
How to pick The Best Spark Plugs for 5.7 Hemi?
If you want the best performance, undoubtedly you have to pick the right spark plug. However, it is not an easy task while plenty of variables out there. But if you focus on some certain factor you can able to find the perfect spark plugs for 5.7 Hemi.
Engine Compatibility
Nevertheless to say you should find the manufacturer’s suggestion. We are talking about your car’s preference rather than your requirements. Usually, a vehicle engine only suits a certain number of plugs. So first of all check the manual to find the recommended type and spaces.
Plug Construction
At first appearance, most of the spark plug looks the same. But they are different from each other if you consider core material. If you notice several you will find iridium, copper/nickel, platinum & double platinum. These also put the user into hesitation about what to choose and which will be better? Let’s do some research on it
Copper/Nickel Plugs
This material is most popular among the user as it is high in temp stability and conductivity. The only downside of this material is its lack of essential strength to offer long lasting service. This material is usually used in older engine systems.
Iridium Plugs
This type of material is current on-trend by the producer. It is intended with a smaller electrode on the middle that can bring extra longevity than others. Besides, it won’t need much operational temp and voltage amplification.
Platinum Plugs
This type of material is enough durable and pretty long-lasting than others. High temp resistance allows the metal to withstand immense heat stress. At the same time, it will prevent unwanted deposit occurrences.
Double Platinum Plugs
This metal is the same as the singular platinum plugs. But the electrode makes the key differences between them. Apart from the middle electrode, you will notice another ground electrode. The combination of these two makes the metal long-lasting.
The final decision relies on vehicle specifications. It means if your engine doesn’t get compatible with a certain type, it won’t work.
Replacement Ease
If all the things go right but unorthodox installation or complex mechanism can make the process tricky. So you should choose the original part replacements first. In this case, the main thing is to consider is the right size and shape. Ensure that it perfectly matches with the compatible model number. Even you can consult with a professional to avoid uncertainty.
Pack Quantity
Pack quantity is another underrated fact to focus on. When we are talking about 5.7 Hemi most of the model comes with a 16-plug system. It is the area where you will need the pack quantity. It will be better if you replace the whole set, as you will get the best result.
What type of spark plugs will be better for 5.7 Hemi?
Still, you are worried about spark plugs for 5.7 Hemi. It looks like the types are not enough to break down. Some people love to install different types to replace the previous type. But it will bring several problems if you do so. At the end of the day, you had to follow the manufacturer’s recommendation. In short, you have to deal with a particular type. It can be nickel or copper, as installing iridium or platinum is a bit harder.
On the other hand, if you want to upgrade the system with something new, you have to replace the whole system. It is strongly recommended to consult with a professional if you planning to do so.
When you should change the Spark Plugs 5.7 Hemi?
After a certain period of use there comes a time when it needs to change the plugs. It shows some symptoms that indicate that the plug is going to die. In this situation, you have replaced the spark plugs for 5.7 Hemi. If the following signs are put in problem, it will be batter to change the plugs.
Frequent Engine Misfire
Every driver wants a system that allows them to run the vehicle smoothly. But a failed plug may stand in the way. As the result, the interior combustion system becomes troubled to affect functionality. In the end, it prevents the engine to run accurately. Misfiring can happen at any time.
Rougher Idling
Smooth vibration and steady sound indicate that the engine running properly. But if you get random or irregular vibration, you should realize that it comes because of faulty plugs. It may put you in an uncomfortable and awkward situation. If you ignore it, it may cause rough and harsh results.
Difficult Start-up
A functioning plug won’t put you in trouble. But when the plug gets unable to take the load, the problem starts. Failed plug cant produce the essential ignition spark in the system. So the start-up process becomes hard and it needs a signifying number of annoying attempts.
Low Acceleration
Heating the system is much easier than fast over good plugs. But if it loses the get-up it will cause you trouble. It can prevent the engine from producing combustion constantly. It also causes a decline in fuel burning. Finally, it decreases the speed.
Reduced Mileage
It’s another peculiar sign that put the engine in trouble. A poor plug can force you to trip the gas station. Apart from these, it leads the fuel to get low over needless & careless usage. So if the fuel consumption rises suddenly, you should change the plug.
However, the manufacturer recommends 100000 miles run between the replacements but you are allowed to get some more if you maintain and take care of the plug properly.
How to Replace Spark Plugs on 5.7 Hemi?
However replacing the spark plug is much easier, but it’s an hour consuming process. If you don’t know about the interior mechanism you should leave it to the professional. It’s an essential and sensitive part of the engine. So you have to be watchful, even if you are confident enough to change it by yourself.
Step 1:
Let’s set the essential gap on replacement plugs before you start the installation process. It is recommended to check the manual to know the gap distance. Even if you don’t find the gap you should use a gapping tool to make the gap. Check the gap twice before set up. You can use a feeler gauge to measure the distance.
Step 2:
Then install the new plug carefully by hand. Smoothly press the washer against its rising ground. To make it happen properly let’s make two full turns to snug all the replacements. Again clockwise turn the plug using a socket wrench.
Step 3:
If the process is done, let’s start replacing the wire connector with a wire or coil boot. Keep in mind that ease of removal relies on the boot material you are using. So it will be better if you use Plastic boots as it helps to click into the right position easily. Conversely if you use a rubber boot you will require an extra coat of die-electric grease.
Step 4:
Finally, repeat the installation program from top to end for putting each plug. Besides, it will be better if you take out visible deposits before starting the process. Avoid tightening the screws to prevent unexpected connectivity failure. In this case, consult with a professional to be clear.
How long do spark plugs last?
Usually, three types of spark plugs are available in the market that offers different types of longevity. Among them, the iridium spark plug is the sturdiest that service for years. Besides, if you have an older car model, iridium spark plugs will be ideal for you as it will help to improve the performance. However people beloved the opposites.
It is a high-end spark plug that has an iridium electrode in the middle and is made with strong alloy. Most importantly it offers 75-80 thousand miles longevity. Do you want to know about platinum spark plugs? It also has a pretty good spark plugs. It is made with double platinum that offers 55-75 thousand miles of longevity. Conversely, you should avoid a spark plug that is built with a copper alloy. It will offer not more than 15-20 thousand miles of longevity.
Even these numbers are also inexact as it can change because of the area and style of driving. Finally, these can be just a number as a good plug may be failing. So if you don’t want to face an accidental situation, you should change the spark plug if required.
Signs of Spark Plug worn?
Without professional help, you can check the spark plug by yourself. Firstly you should pay attention to the length of the gap between carbon and electrodes. Then mark on the information on the gap between these two. The last digit of the number is specified in millimeters.
If you find a gap more than 0.31 inches you should change the plug immediately. It should not be soiled as the plug electrodes are self-cleaning. If you get the spark plug white or black, it means you should go to a professional. Besides, if you find a different color it means one is wet and the second one is with soot. You should also change the whole plugs if you find the situation.
Should I adjust the gap of the spark plug?
The ideal gap of the 5.7 HEMI spark plug is 0.43”. If you find it smaller or bigger then what will be the effect? A bigger gap is considerable for fuel ignition, as it designs with plenty of fuel-air combinations between the contacts. But there have the changes of misfires. On the other hand, if you find the spark plug gap smaller, it indicates the plug will be strong but short. It causes the lack of access to the fuel-air mix so the plug will be the first part that will suffer.
Final words
However, it’s a bit tough to find the best spark plugs for 5.7 l Hemi but hope you are confident enough to decide after reading our reviews and buying guide. Still, if you have confusion and want to know our opinion we will recommend NGK 5464 Iridium IX Spark Plug.
It is available at an affordable price that is made with durable Iridium metal and offers improved throttle response. So upgrading your vehicle with this NGK 5464 Iridium IX Spark Plug will boost all over performance.
