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Do all Hemis have 16 plugs?

No, not all Hemi engines have 16 spark plugs. The number of spark plugs in a Hemi engine can vary depending on the specific model and engine configuration.


Explaining Hemi Engines and Spark Plugs


Hemi engines, named after their hemispherical combustion chambers, are a type of internal combustion engine design commonly used in high-performance vehicles. These engines are known for their powerful and efficient performance, but the number of spark plugs can differ across various Hemi models.


Spark Plug Count in Hemi Engines



  • The classic Chrysler Hemi V8 engines, such as the 426 Hemi and 392 Hemi, typically have 8 spark plugs, with one plug per cylinder.

  • Some modern Hemi V8 engines, like the 5.7L and 6.4L Hemi found in Dodge and Jeep vehicles, also have 8 spark plugs.

  • However, there are also Hemi engines with 16 spark plugs, such as the 6.2L Hemi V8 used in the Dodge Challenger and Charger Hellcat models. These engines have two spark plugs per cylinder for improved combustion and performance.


The number of spark plugs in a Hemi engine is primarily determined by the engine's design and the manufacturer's engineering decisions to optimize performance, efficiency, and reliability.

How many spark plugs does a 6.1 Hemi have?


16 spark plugs
In this video, SRTaddicts will show you how to replace all 16 spark plugs and 8 ignition coils.



Which HEMIs have 16 spark plugs?


How many spark plugs are there in a Hemi V8? All modern Chrysler Hemi engines use two spark plugs per cylinder for a total of 16 spark plugs.



Which engine has 2 spark plugs?


Dual ignition. Dual Ignition is a system for spark-ignition engines, whereby critical ignition components, such as spark plugs and magnetos, are duplicated. Dual ignition is most commonly employed on aero engines, and is sometimes found on cars and motorcycles.



Do all 5.7 Hemis have 16 spark plugs?


How many spark plugs are there in a Hemi V8? All modern Chrysler Hemi engines use two spark plugs per cylinder for a total of 16 spark plugs. This includes engines built in 2003 and later, ranging from the 5.7 liter to the 6.2 liter Hellcat engine.



How many spark plugs does a 426 Hemi have?


The original 426 ““Elephant” Hemi had 8 spark plugs. You could buy aftermarket heads that HD 2 plugs per cylinder. The present day hemisphere motors have 2 per cylinder.



Which Hemis have 16 spark plugs?


How many spark plugs are there in a Hemi V8? All modern Chrysler Hemi engines use two spark plugs per cylinder for a total of 16 spark plugs.



What engine has 16 cylinders?


V16 engine. A V16 engine is a sixteen-cylinder piston engine where two banks of eight cylinders are arranged in a V configuration around a common crankshaft. V16 engines are less common than engines with fewer cylinders, such as V8 and V12 engines.



What engines have 16 spark plugs?


Modern Hemi engines have 16 spark plugs. One fires on top of the compression stroke, the other is a restrike that clears up emissions and adds just a teeny bit of oomph when it fires during the power stroke.



How many spark plugs does a 6.4 Hemi have?


16 spark plugs
The 6.4L HEMI engine's cylinder head design plays a crucial role in enhancing its performance. Mimicking the structure of late 5.7 HEMI heads, each cylinder head includes two valves and dual spark plugs per cylinder—totaling 16 spark plugs. This setup optimizes the combustion process, ensuring efficient power delivery.



Do Hemis use 2 spark plugs?


There are two spark plugs per cylinder in a HEMI V8 engine. So, when the plugs need replacing, there are 16 to change, not eight. Also, it should be noted that all HEMI V8 engines use coil-on-plug ignition systems.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.