Racing Plug 5442

【NGK R7376-8 Racing Plug 5442 ngk r7376-8-5442】
Racing plugs recommended for two-wheelers and four-wheelers are available in various types for further performance improvement when used in races, circuit driving, or with increased engine output due to tuning.
Therefore, the shape differs from the manufacturer's standard plug, and plug life and low-speed performance may be slightly compromised.
However, they are also developed and designed to perform well even in extremely tuned engines and under very harsh operating conditions, and are set with a wide range of heat ratings.
Please select the appropriate plug for your engine to fully unleash its performance.
Precautions when choosing racing plugs
Research the thread size, plug type, and shape from the part number of your genuine plug or the plug you are currently using, and then select the corresponding type.
Please refer to the manufacturer's website for guidance on choosing the insulator 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 maintain the plug's firing end temperature within the optimal range.
Simply increasing the heat rating alone will not improve engine performance.
For street use, numbers 7-8 are mainly used; for track day specifications, 8-9; and for race specifications, 9-10.
The presence or absence of a resistor in the plug makes almost no difference nowadays due to improvements in ignition system performance.
Resistor types will become mainstream in the future.
Conversely, non-resistor types may cause engine trouble in some models of certain vehicles.
In such cases, always use a resistor type.
*Images are for illustration purposes only. The design and specifications of the products shown are subject to change without prior notice. Thank you for your understanding.