Racing plug 4985

【NGK R7282-105 Racing Plug 4985 ngk r7282-105-4985】
The racing plugs recommended for two-wheeled and four-wheeled vehicles come in various types designed to further improve performance when used with increased engine output due to racing, circuit driving, or tuning.
Therefore, their shape may differ from the manufacturer's standard plugs, and plug life and low-speed performance may be slightly compromised.
However, on the other hand, they are developed and designed to perform fully and withstand even in extremely tuned engines and very severe operating conditions, with a wide range of heat ratings up to very high values.
Please select the appropriate plug for your individual engine to fully unleash its performance.
Points to note when choosing a racing plug
From the part number of the genuine plug or the plug you are currently using, determine the screw size, plug type, and shape, and then select the corresponding type.
Please refer to the manufacturer's website for guidance on how to choose the ignition end shape.
The heat range must be chosen considering the increase in combustion temperature due to improved engine output and operating conditions, in order to maintain the plug's ignition end temperature within the optimal range.
Simply increasing the heat range alone will not improve engine performance.
Generally, heat ranges 7-8 are used for street driving, 8-9 for track day specifications, and 9-10 for race specifications.
The presence or absence of a resistor in the plug makes almost no difference nowadays due to improvements in ignition system performance.
In the future, resistor types will become the mainstream.
Conversely, non-resistor types may cause engine problems in some models of some vehicle types.
In such cases, please be sure to use the resistor type.
*The image is for illustration purposes only, and the design and specifications of the products shown are subject to change without prior notice. Please be aware of this.