Ultra-fine .4mm diameter electrode requires less voltage and increases performance.
Tapered Cut electrode reduces quenching, improving firing performance.
U-Groove maintains a large volume of space to form the nucleus of the flame.
360 degree laser welding process provides a seal so reliable that even in the harshest conditions, the electrode resists wear.

These are special order from Japan and will take about 6 weeks to arrive to the USA. These plugs are extremely cold and will alter your idle. We recommend these plugs only for extreme applications of very high horsepower.

These are 3 heat ranges colder than the stock Supra plug. Price is for one plug.

MSRP: $14.68