SET OF 2 PERFORMANCE SPARK PLUG YAMAHA&nbsp;WaveBlaster WB700 (1996-1993) * HRO271NOR14LGSXC 1. Higher HP and torque by up to 3 % 2. increased economy by up to 5% 3. 360 Firing Technology 4. Improved acceleration by up to 15 % 5. 5 UP TO 600 HOUR LIFESPAN