Iridium Plug SILMAR9C9 91086

[Stock number] 3653

**The tightening rotation angle is different.Refer to the installation instructions of the plug and install it with the appropriate tightening rotation angle.

*Even if you purchase in units of 10 pieces (1 box), it will not be delivered in 1 box.
*Terminals, tightening angle, etc. may differ depending on the model.Please refer to the link for the detailed fitting and installation instructions.
*There may be changes in product specifications due to the manufacturer's reasons.
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Webike stocks the full range of NGK plugs.
*May be temporarily out of stock due to manufacturer's shortages or other reasons.

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Stable ignition performance and combustion efficiency at a reasonable price.
It brings out the true performance of the engine.

[Features]
1. Improved acceleration
You can feel the difference between this plug and the standard plug by its quick response to the accelerator pedal opening.
Changing to Iridium plugs will improve acceleration.

2. Engine power pup
Iridium plugs increase engine performance.
You can enjoy a comfortable ride with a strong power on the uphill.

3. Improved ignitability and startability
Iridium plugs have ultra-fine electrodes that ignite quickly and improve the starting performance of the engine.
The idling is stable because of less spark variation.

4. Increased fuel efficiency
Iridium plugs have excellent ignitability, so they burn gasoline efficiently.
This plug is both economical and environmentally friendly.

As a premium plug for stock engines, an ultra-fine iridium alloy has been adopted for the central electrode to achieve superior ignitability and greatly improved response.
The electrode is thin and sparks fly easily, so the energy is large and the ignitability is improved.
It maximizes the performance of the engine.
In addition, the thermo edge at the tip of the insulator burns off the attached carbon (burnt debris), prevents the ignition performance of the plug from deteriorating, and maintains high performance.
*Effectiveness may vary depending on the vehicle.

[About the shape of the plug terminal]
●Select a terminal shape that matches the engine and plug cord installation side.
There are three types of plug terminals: integrated type, separate type, screw type, and punch-and-caulk type.
Mainly, "integral type" and "punch caulking type" are used for four-wheeled vehicles and "screw type" for two-wheeled vehicles, and "separate type" is available for plugs used for both four-wheeled and two-wheeled vehicles.
In addition, the terminal part of the "separate type" can be removed, but the terminal part of the "integrated type" and "punch-and-caulk type" cannot be removed.
If you try to remove it forcibly, the terminal part may be broken.
In case of using the "separate type" as the "screw type", remove the terminal nut.
When using the product with the terminal nut attached, make sure that it is not loose, and if it is loose, tighten it lightly with pliers or the like.

[Features of NGK plugs]
- This is a super "wide-range" plug
The central electrode has a "copper-cored" structure with copper encapsulated close to the tip to allow a large amount of heat to escape quickly.
The result is an ultra "wide range" plug that is resistant to burning and smoldering.
Comparing the thermal characteristics of copper-cored and copper-coreless plugs, the copper-cored plug has superior thermal characteristics and stain resistance and a wider thermal range.

■Thermal value of plug
- High alumina porcelain of new ceramics is used for the insulator -
・Excellent insulation at high temperatures and reliable sparking.
・Excellent heat conductivity and prevents seizure.
・High thermal shock resistance (rapid heating and cooling) and excellent mechanical strength.

- The structure is strong and airtight
The insulator and main metal fittings are joined by a special powder, making them airtight and structurally strong.

- Corrugations (folds) in the insulator ensure insulation and prevent flashover -
During park, a high voltage is constantly applied between the terminal and the main fittings.
High voltages try to leak along the surface of the insulator and flashover is more likely to occur if the required voltage between the spark gaps is high.
In order to prevent flashover, insulator corrugations (folds) are provided to increase the insulator surface distance between the terminal and the main fittings to ensure insulation and prevent flashover.

What is a flashover.
It is to spark between the terminal and the main fittings as shown in the image.