Racing Plug 4492

【NGK R6918B-8 Racing Spark Plug 4492 ngk r6918b-8-4492】
Racing spark plugs recommended for two-wheeled and four-wheeled vehicles come in various types designed to further enhance performance when used in races, circuit driving, or with engines whose output has been increased through tuning.
Consequently, their shape differs from the standard plugs specified by the manufacturer, and the plug's lifespan and low-speed performance may be slightly compromised.
However, on the other hand, they are developed and designed to perform well even in highly tuned engines and under very severe operating conditions, and are available in a wide range of heat ratings, up to very high values.
Please select the appropriate plug for your individual engine to achieve its full performance potential.
Points to consider when choosing a racing spark plug:
Determine the thread size, plug type, and shape from the part number of your genuine plug or the plug you are currently using, and select the corresponding type.
Please refer to the manufacturer's website for how to choose the ignition tip shape.
The heat range must be selected to maintain the optimal temperature range of the plug's ignition tip, taking into account the increase in combustion temperature due to improved engine output and operating conditions.
Simply increasing the heat range alone will not improve engine performance.
Generally, heat ratings of 7-8 are used for street driving, 8-9 for track days, and 9-10 for racing.
In terms of the presence or absence of a resistor in the plug, there is now almost no difference due to improvements in ignition system performance.
Resistor types will become the mainstream going forward.
Conversely, non-resistor types may cause engine problems in some models of some vehicle types.
In such cases, please be sure to use a resistor type.
*The image is for illustration purposes only, and the design and specifications of the products shown are subject to change without notice. Thank you for your understanding.