Racing Spark Plug 4899

【NGK R7436-9 Racing Spark Plug 4899 ngk r7436-9-4899】
Racing spark plugs, recommended for both 2-wheel and 4-wheel vehicles, come in various types designed to further enhance performance when used in races, circuit driving, or with engines that have increased output due to tuning.
Consequently, their shape differs from standard plugs specified by the manufacturer, and plug life and low-speed performance may be slightly compromised.
However, conversely, 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 available.
Please select the appropriate plug for your individual engine to achieve its full potential.
Points to consider when choosing a racing spark plug
From the part number of your genuine plug or the plug currently in use, determine the thread size, plug type, and shape, then select the corresponding type.
Please refer to the manufacturer's website for guidance on choosing the correct firing end shape.
The heat rating needs to be selected considering the increase in combustion temperature due to engine output improvement and operating conditions, in order to maintain the spark plug's firing end temperature within the optimal range.
Simply raising the heat rating alone will not improve engine performance.
Typically, a heat rating of 7-8 is 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 mainstream in the future.
Conversely, non-resistor types may cause engine problems in some models of certain vehicles.
In such cases, always use a resistor type.
*The image is for illustrative purposes only, and the design and specifications of the products shown may change without prior notice. Thank you for your understanding.