Main Products
We stock a wide variety of spark plugs.
Main Products
Iridium plug
Purpose
For two-wheeled vehicles and four-wheeled vehicles
Features
This high-performance, long-life spark plug utilizes an iridium alloy for the center electrode and a platinum alloy for the discharge portion of the outer electrode, minimizing electrode wear.
Single iridium plug
Purpose
For two-wheeled vehicles and four-wheeled vehicles
Features
This high-performance, long-life spark plug features an iridium alloy center electrode, minimizing electrode wear.
Highly ignitable iridium plug – angular chip type
Purpose
For two-wheeled vehicles and four-wheeled vehicles
Features
By employing a thin-diameter central shaft and tapering the tip of the outer electrode, the spark is concentrated at the tip while suppressing the flame extinguishing effect. Furthermore, to ensure durability, a thin, angular platinum alloy is welded to the outer electrode.
High-ignition iridium spark plug (PSPE® type)
Purpose
For four-wheeled vehicles
Features
Compared to conventional spark plugs, this plug features a shorter outer electrode and reduced fouling on the center electrode, thereby reducing flame suppression and further improving ignition performance. Furthermore, it offers superior protection against breakage by suppressing overheating of the outer electrode, resulting in a high-performance, long-life spark plug that ensures stable combustion without abnormal combustion even in high-compression engines.
Highly ignitable iridium plug – DFE type
Purpose
For two-wheeled vehicles and four-wheeled vehicles
Features
This high-performance, long-life spark plug minimizes flame suppression to the extreme by using an iridium alloy for the center electrode and a rod-shaped platinum alloy for the outer electrode.
Three-pole iridium plug
Purpose
For four-wheeled vehicles
Features
Under normal conditions, sparks fly from the main electrode. When the plug is fouled or smoldering, sparks fly between the electrodes on both sides, burning off the carbon deposits, making it a highly resistant plug to fouling.
Platinum plug
Purpose
For two-wheeled vehicles and four-wheeled vehicles
Features
This high-performance, long-life plug utilizes a platinum alloy for both the center electrode and the discharge section of the outer electrode, minimizing electrode wear.
M10 High-Performance Plugs
Purpose
For two-wheeled vehicles and four-wheeled vehicles
Features
By reducing the diameter of the spark plug, the engine's cooling water passages can be enlarged, improving engine cooling performance. This also contributes to vehicle weight reduction, which is related to fuel efficiency. In response to the requirement for improved voltage resistance, 40kV was achieved by applying a new insulating material.
Resistor plug
Purpose
For motorcycles, cars, agriculture, forestry, ships, and industry.
Features
A ceramic resistor (typically around 5kΩ) built into the spark plug suppresses ignition noise generated by the spark, eliminating interference that can be picked up by car radios, mobile phones, and other devices. It also prevents malfunctions in electronic fuel injection control systems.
Green plug
Purpose
For motorcycles, cars, agriculture, forestry, ships, and industry.
Features
The center electrode has a 90° groove to facilitate spark generation. Because the spark occurs closer to the outer edge of the center electrode, the flame-extinguishing effect of the electrode is reduced, improving ignition performance. Therefore, it is effective during starting, idling, and acceleration.
Protrusion-type plug
Purpose
For four-wheeled vehicles
Features
By positioning the ignition point near the center of the combustion chamber, stable combustion can be achieved. However, if the protruding spark plug is used in an engine other than the one specified, it will come into contact with the piston, valves, etc., so it cannot be used in vehicles other than those specified.
Metal fitting protrusion-type plug
Purpose
For four-wheeled vehicles
Features
In addition to the features of a standard protruding plug, a metal protruding plug allows for a shorter outer electrode, reducing stress from heat and vibration. Furthermore, the metal protrusion prevents liquid fuel from adhering to the gas volume along the combustion chamber wall, improving resistance to fouling.
Multi-polar plug
Purpose
For two-wheeled vehicles and four-wheeled vehicles
Features
The purpose of using a multi-pole design for the outer electrode is to distribute electrode wear and ensure durability. Additionally, multi-pole plugs have the effect of improving discharge characteristics (reducing the required voltage).
Multi-polar semi-creeping discharge plug
Purpose
For four-wheeled vehicles
Features
In addition to the features of a standard multi-pole plug, the semi-surface discharge type plug has a structure in which the spark flies along the surface of the insulator. Because the spark discharge burns off the carbon adhering to the insulator, it is a plug that is highly resistant to fouling and fouling.
Plug with an auxiliary spark gap
Purpose
For four-wheeled vehicles
Features
This spark plug is designed to improve resistance to fouling by using an auxiliary spark gap to ignite the spark only when the original spark plug is slightly fouled. Once the carbon deposits are burned off, it will discharge through the normal gap.
Plug for rotary engines
Purpose
For rotary engines in four-wheeled vehicles
Features
Rotary engines have a high number of explosions and the spark plugs are exposed to combustion gases for long periods, among other demanding conditions. Therefore, they employ spark plugs with a special ignition section shape that is both highly durable and provides excellent ignition.
Compact plug
Purpose
Agricultural, forestry, and industrial use
Features
With its low profile from the plug seat to the terminals, compact size, and lightweight design, it's ideal for small engines such as those found in lawnmowers and chainsaws.
For information and part number searches on aftermarket products, please visit the "NGK Spark Plug / NTK Technical Ceramics Product Site" website.
For inquiries regarding this product, please contact us here.
