Difference Between EK 4 and EK 9

The building of a vehicle is a complex process involving a number of different components. One of the basic building structures is the chassis. They are of different types, and each one is different from the others. EK refers to chassis code, and numbers indicate the models. EK 4 and EK 9 are two chassis models having different characteristics.


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After a chemical reaction, the properties of the products are __________.

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A bond that occurs between metals and nonmetals is called a/an _______________.

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EK 4 vs EK 9

The difference between EK 4 and EK 9 is that EK 4 constitutes a b16a DOHC VTEC engine whereas, on the other hand, the EK 9 model constitutes a b16b DOHC VTEC engine. There is also a significant difference seen in both chassis. The Ek 4 model is lighter than the EK 9 model.

EK 4 vs EK 9

The EK 4 chassis model is the one that has a b16a DOHC VTEC engine. It requires the standard four nuts to hold the wheel. The chassis also has a seamless chassis and is a lot lighter in weight when compared to the EK 9 chassis model.

The EK 9 chassis model is a heavyweight chassis and constitutes an advanced b16b DOHC VTEC engine. It requires five nuts to hold the wheel with convenience. However, the steering wheel gives a bit harder feel while driving when compared to the EK 4 chassis.

Comparison Table

Parameters of ComparisonEK 4EK 9
EngineEK 4 has a b16a DOHC VTEC engine.EK 9 has a b16b DOHC VTEC engine.
No. of nutsIt requires four nuts to hold the wheel.It requires five nuts to hold the wheel.
ChassisThe chassis is made up of seamless welding of beams and is lightweight.The chassis is made up of seam-welded stiff bars, which are also present behind the bumper and is heavyweight.
ARBThe rear ARB is 13 mm in EK 4.The rear ARB is 22 mm in EK 9.
Shocks and SpringsIt doesn’t have much advanced shocks and springs.EK 9 has better and advanced shocks and springs.

What is EK 4?

The EK 4 chassis is a great model with lots of advances and features. It looks pretty similar to the EK 9 chassis model but has a lot of different factors. The best feature of the EK 4 chassis is that it is very light in weight. 

The EK 4 chassis arrived with a b16a DOHC VTEC engine, and the requirement to hold the wheel is just four nuts. There is a unique thing about the material used for the building of the EK 4 chassis, which is also made up of seamless welded bars.  Its rear ARB is 13mm, and also the EK 4 model doesn’t have much advanced or better shocks and springs than the EK 9 chassis model. 

Coming to describe the steering, EK 4 gives a fantastic feeling of the well-structured power steering.  While driving, it can provide a hard time to the driver due to a bit of poor rolling on the corners. There is also a factor that in the EK 4 chassis model, the front wheels may not be followed by the rear ones. It also does not comprise a Type R badge which is present in the EK 9  model.

What is EK 9?

The EK 9 chassis is a powerful model of the EK series. It has some better and more unique specifications when compared to the EK 4 model. Whether it is the engine or drive feel, the EK 9 model feels superior to the EK 4.

The EK 9 chassis model has an immensely powerful b16b DOHC VTEC engine giving it an extra edge over the other chassis. The chassis is also very carefully built, having seam welded stiff bars. These rigid bars are also present behind the bumpers giving more safety. The rear ARB of EK 9 is 22mm and also comes with the best in class shocks and springs which are better in comparison to the EK 4 model. 

When we look into the matter of steering, it may not give a better performance at power steering. But the drive is easy to handle and smooth with exceptional rolling on the corners; therefore, it is an excellent pick for long journeys on uneven and curvy roads. It also has a Type R badge. The EK 9 model equips a Limited slip differential and light in weight windscreen, which is not present in the case of the EK 4 model.

Main Differences Between EK 4 and EK 9

  1. The EK 4 model has a b16a DOHC VTEC model, while the EK 9 chassis model has a b16b DOHC VTEC engine.
  2. The EK 4 does not have a limited-slip differential, whereas the EK 9 model has. EK 9 even has a light windscreen.
  3. Only four nuts are required in EK 4 to hold the wheel, whereas, in EK 9, five nuts are needed.
  4. The ARB is 13mm in the rear for EK 4 and is 22mm in the case of the EK 9 model.
  5. The EK 4 has a seamlessly welded chassis, whereas the EK 9 chassis has seam welded stiff bars and is also heavier than EK 4.


  1. https://onlinelibrary.wiley.com/doi/abs/10.1111/mmi.12120
  2. https://ieeexplore.ieee.org/abstract/document/1428543/
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