Racing Spark Plugs 3920

【NGK R7282A-10 Racing Spark Plug 3920 ngk r7282a-10-3920】
Racing spark plugs, recommended for two-wheel and four-wheel vehicles, come in various types designed to further improve performance when used in races, on circuits, or with engines tuned for higher output.
Consequently, their shape differs from standard manufacturer-specified plugs, and plug life and low-speed performance may be slightly compromised.
However, in return, they are developed and designed to fully demonstrate their performance and withstand extremely tuned engines and very harsh operating conditions, with a wide range of heat ratings available.
Please select the appropriate plug for your specific engine to achieve its full potential.
Important points for choosing racing spark plugs
Please determine the screw 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.
Refer to the manufacturer's website for guidance on how to choose the ignition tip shape.
The heat rating needs to be selected considering the increase in combustion temperature due to improved engine output and operating conditions, in order to keep the ignition tip temperature within the optimal range.
Simply increasing the heat rating alone will not improve engine performance.
For mainly street use, numbers 7-8 are commonly used; for track day specifications, 8-9; and for racing specifications, 9-10.
There is hardly any difference in the presence or absence of a resistor in the plug these days, due to advancements 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, always 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. We appreciate your understanding.