NGK traditional plugs are constructed for longer life and optimum performance. Corrugated ribs prevent flashover. NGK uses only the purest alumina silicate in its ceramic insulator which give all NGK plugs greater strength and better heat transfer. Copper cored and triple sealed to further aid in heat removal and prevent interior leakage.
The BKR7E is generally considered THE plug to have for the turbo MR2 and Celica All Trac, especially if you have turned the boost up above factory specifications.
Sold as sets of 4.