NGK Racing Spark Plug - R6254E-105 Internal fluid pressure is the

Internal fluid pressure is the most important element that affects how effective your cooling system is at engine heat dissipation

1 outer ring

so all types and sizes of helmets fit into it

Multiple reinforced padded grab handle

Factory-Links bearings are filled with a premium quality

NGK Racing Spark Plug - R6254E-105 Internal fluid pressure is theThe Racing Spark Plug intended for competition should be able to resist to extreme conditions: Repeated acceleration and deceleration with power Intensive engine operating at high rev. Extreme condition inside combustion chamber such as temperature variation, pressure, vibration and turbulences cannot be sustained by a standard spark plug.