Racing Spark Plugs 4457

【NGK R7376-10 Racing Plug 4457 ngk r7376-10-4457】
Racing plugs recommended for two-wheel and four-wheel vehicles are available in various types to further improve performance when used in races, circuit driving, or with increased engine output due to tuning.
Therefore, their shape differs from the manufacturer's standard plugs, and the plug's lifespan and low-speed performance may be slightly compromised.
However, on the other hand, they are developed and designed to fully exhibit performance and withstand extremely tuned engines and very harsh operating conditions, with a wide range of heat ratings.
Please select the appropriate plug for your specific engine to fully unleash its performance.
Precautions when choosing racing plugs:
Please check 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.
Please refer to the manufacturer's website for guidance on choosing the ignition end shape.
The heat rating needs to be selected considering the increase in combustion temperature due to increased engine output and operating conditions, in order to maintain the plug's ignition end temperature within the optimal range.
Simply increasing the heat rating alone will not improve engine performance.
For mainly city driving, numbers 7-8 are used; for track day specifications, numbers 8-9 are used; and for race specifications, numbers 9-10 are used.
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 the mainstream in the future.
Conversely, non-resistor types may cause engine trouble in some models of some vehicles.
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 displayed are subject to change without notice. Please be aware of this.