Ignition Leads and Spark Plug Covers

Get Connected with NGK Ignition Leads

Outstanding insulating characteristics, a high level of heat resistance (up to 200°C) as well as resistance to vibrations and fluctuations in temperature and humidity are the primary requirements to be fulfilled by OE quality ignition leads. Only if they fully meet these requirements can ignition leads deliver reliability under extreme conditions – even over an extended period of time.

There are three different types of ignition leads, copper core, resistive and reactive which differ based on the materials used for the conductor and the type of resistor required for interference suppression. The technology used in NGK ignition leads meets the OE standards of car manufacturers.

Types of Ignition Leads

Copper core ignition leads with interference suppression

Carbon resistor ignition leads

Ignition leads with inductive resistor

Spark Plug Covers

The NGK range of resistor covers are designed to give perfect noise suppression across all frequencies whilst engine performance is not adversely affected whatsoever.

Featuring a resistor element pressed in between the plug terminal and the high tension wire connection, the construction is extremely durable, the resistor element is long enough to prevent interior flashover, and steady resistance is maintained. Superlative ceramic materials are incorporated that resist deterioration and have small resistance variation under over-load, whilst the plug connector is made of sturdy phenolic resin, practically oblivious to tremendous heat and high tension, and very rugged rubber material. The heat press insertion makes the construction all the more tough and vibration-resistant. Special rubber liners on both ends prevent moisture from causing electrical leakage.

All motorcycle manufacturers now comply with current legislation which demands a standard of noise suppression on every vehicle. This is achieved usually by fitting NGK resistor covers though in many cases a combination of NGK resistor covers and NGK resistor spark plugs (R type) is necessary to satisfy the ministry tests. It is emphasized that despite the use of both resistor covers and spark plugs in such engines, due to the unique and superior construction of NGK branded products there is no loss of performance or shortening of service life.