NGK Racing spark plug reference R7438-8 for PEUGEOT 206 2.0 16V RC Gr.N or NISSAN 350Z 3.5 24V Gr.N.

NGK Racing spark plug reference R7438-8 for PEUGEOT 206 2.0 16V RC Gr.N or NISSAN 350Z 3.5 24V Gr.N.


Choose the right spark plug according to the design of the electrode, the temperature of the spark plug, the level of preparation of your engine and the racing conditions.
Spark plugs with a high temperature rating have higher cooling capacities.
NGK racing spark plugs have been developed for use in engines that have been modified. They enable maximum power to be achieved under specific external conditions, especially at high ambient temperatures.
NGK racing plugs differ from standard plugs in appearance and performance. They sacrifice service life and performance at low rpm in favour of high rpm.

How to choose your NGK racing spark plug

- Spark plug design: To determine the design of the spark plug, consult your vehicle manual or the specifications of the spark plugs you use to check: thread, diameter, length and characteristics of the spark plug washer.

- The design of the spark plug electrode: The longer the electrode, the better the spark and ignition of the mixture in the cylinder. Longer electrodes are more prone to wear. The stresses of heat and vibration on racing engines are the reason why it is advisable to choose an electrode design that reduces its risk of wear.

- Sprayed type:
Almost similar to a standard spark plug electrode, these plugs give good overall performance for lightly modified and naturally aspirated engines as well as turbocharged engines for low and mid-range torque.

- Square ground type:
This type of electrode provides superior performance for turbo engines. The short electrode is largely more resistant to the impacts of the explosion.

- Half-surface type:
This is the ultimate spark plug configuration. Virtually all ground electrode cracks and positive electrode melting problems are avoided with this type of plug. The service life and performance at low engine speeds are reduced.

Spark plug temperature: It is very important to choose a temperature rating that keeps the electrode at an ideal operating temperature even under extreme racing conditions. A high temperature rating does not provide better performance, it simply improves the ability of the spark plug to dissipate heat.

Resistors: Due to the automatic ignition timing systems, there are differences in performance between spark plugs with and without resistors. Also some engines require resistor spark plugs depending on the model to avoid engine problems.

Spark plug characteristics :

Suitable for :
- PEUGEOT 206 2.0 16V RC (EW10J4S) Gr.N
- NISSAN 350Z 3.5 24V (Engine VQ35DE) Gr.N
- MITSUBHISHI Lancer 2.0 16V turbo (EVO 9) Gr.N
- SUBARU Impreza 2.5L 16V WRX 2.5L 16V STi Gr.N