Racing Plug 4655

【NGK R7437-10 Racing Plug 4655 ngk r7437-10-4655】
Racing plugs recommended for two-wheelers and four-wheelers come in various types designed to further improve performance when used with increased engine output due to racing, circuit driving, or tuning.
Consequently, their shape differs from the standard plugs specified by the manufacturer, and plug life and low-speed performance may be slightly compromised.
However, on the other hand, they are developed and designed to fully demonstrate their performance even in extremely tuned engines and under very severe operating conditions, and are set to withstand these conditions, with a wide range of heat ratings up to very high values.
Please select the appropriate type for your specific engine to achieve full performance.
Important points when choosing racing plugs
From the part number of the genuine plug or the plug you are currently using, determine the thread size, plug type, and shape, and 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 plug's ignition end temperature within the optimal range, taking into account the rise in combustion temperature due to increased engine output and operating conditions.
Simply raising the heat rating alone will not improve engine performance.
For mainly street use, ratings 7-8 are common; for track day specifications, 8-9; and for racing specifications, 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 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. Please be aware of this.