Racing Plug 6991

[NGK R7376-7 Racing Plug 6991 ngk r7376-7-6991]
Racing plugs, recommended for two-wheelers and four-wheelers, are available in various types to further improve performance when used in races, circuit driving, or with increased engine 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, they are developed and designed to perform adequately and withstand even in extremely tuned engines or under very severe operating conditions, with a wide range of heat ratings.
Please select the appropriate type for your specific engine to fully unleash its performance.
Precautions when choosing a racing plug
Please check the screw size, plug type, and shape from the part number of the genuine plug or the plug you are currently using, and then select the corresponding type.
Refer to the manufacturer's website for how to choose the ignition tip shape.
The heat rating needs to be selected to maintain the plug's ignition tip temperature within the optimal range, taking into account the increase in combustion temperature due to engine output improvement 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 days, and 9-10 for racing.
In recent years, due to improvements in ignition system performance, there is almost no difference whether the plug has a resistor or not.
Resistor types will become the mainstream going forward.
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 illustration purposes only, and the design and specifications of the products shown may change without prior notice. Please be aware of this.