Racing Plug 3388

【NGK R0373A-9 Racing Plug 3388 ngk r0373a-9-3388】
Racing 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 increased engine output due to tuning.
Therefore, their shape may differ from the manufacturer's standard plug, and plug life and low-speed performance may be slightly compromised.
However, on the other hand, they are developed and designed to fully demonstrate performance and withstand even extremely tuned engines and very severe operating conditions, with a detailed range of heat ratings.
Please select the appropriate plug for your individual engine to achieve full performance.
Points to note when choosing a racing plug
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 how to choose the firing end 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 keep the plug's firing end temperature in the optimal range.
Simply raising the heat rating alone will not improve engine performance.
Generally, heat ratings of 7-8 are used for street use, 8-9 for track day specifications, and 9-10 for race specifications.
Recently, due to improvements in ignition system performance, there is almost no difference regarding the presence or absence of a plug resistor.
Resistor types will become the mainstream going forward.
Conversely, non-resistor types may cause engine problems in some models of some vehicle types.
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 may change without prior notice. Thank you for your understanding.