What is a resistor spark plug

A It incorporates a ceramic resistor to suppress ignition noise generated during sparking.
FEATURE
It incorporates a ceramic resistor.

It suppresses ignition noises from sparks.

Resistor spark plugs prevent electrical interference that can disrupt car radio reception, two-way radio and cellular phone operation.
This type of spark plug also prevents electrical noise from interfering with the operation of the computer in the engine.
Noise suppression effects of a resistor spark plug
(Compared with one of our conventional types)

As shown above, noise is reduced in all frequency zones by installing resistor spark plugs.

As the resistor spark plug has an incorporated resistor, some people think that it has adverse effects on start-up, acceleration, fuel economy and emissions. However, this is wrong. It does not affect engine performance so don't hesitate to use it.