Racing Plug 4256

【NGK R5673-6 Racing Spark Plug 4256 ngk r5673-6-4256】
Racing spark plugs, recommended for two-wheelers and four-wheelers, are available in various types aimed at further improving performance when used in races, circuit driving, or with engines tuned for higher output.
Consequently, their shape may differ from the manufacturer's standard plugs, and plug life and low-speed performance may be slightly compromised.
However, on the other hand, they are developed and designed to fully exhibit performance and withstand even extremely tuned engines and very severe operating conditions, with a wide range of heat ratings up to very high values.
Please select the appropriate plug for your specific engine to achieve full performance.
Points to consider when choosing racing spark plugs
Determine the thread size, plug type, and shape from your genuine plug or the part number of the plug you are currently using, and select the corresponding type.
Please refer to the manufacturer's website for guidance on selecting the ignition tip shape.
The heat rating needs to be selected to maintain the optimal operating temperature of the plug's ignition tip, 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 of 7-8 are used for street driving, 8-9 for track day specifications, and 9-10 for race specifications.
The presence or absence of a resistor in the spark 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 certain vehicles.
In such cases, always use a resistor type.
*The image is for illustration purposes only, and the design and specifications of the products shown are subject to change without notice. Please be aware of this.