Racing Plug 3155

【NGK R5540F-105 Racing Plug 3155 ngk r5540f-105-3155】
Racing plugs, recommended for two-wheelers and four-wheelers, are available in various types aimed at further performance improvement when used in races, circuit driving, or with increased engine output due to tuning.
As a result, their shape differs from the manufacturer's standard plugs, and plug life and low-speed performance may be slightly compromised.
However, conversely, they are developed and designed to fully demonstrate their performance and withstand even extremely tuned engines or very harsh operating conditions, with a wide range of heat ratings.
Please select the appropriate plug for your individual engine to achieve its full potential.
Points to note when choosing a racing plug:
From the part number of your genuine plug or the plug you are currently using, determine the thread size, plug type, and shape, then select the corresponding type.
Please refer to the manufacturer's website for guidance on how to choose the ignition end shape.
The heat rating needs to be selected to maintain the optimal temperature range of the plug's ignition end, taking into account the rise in combustion temperature due to increased engine output and operating conditions.
Simply increasing the heat rating alone will not improve engine performance.
Generally, heat ratings 7-8 are used for street driving, 8-9 for track day specifications, and 9-10 for race specifications.
There is almost no difference in the presence or absence of a resistor in plugs 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 certain vehicle types.
In such cases, please be sure to use a resistor type.
*The image is for illustrative purposes only, and the design and specifications of the products shown are subject to change without notice. Thank you for your understanding.