BSET OF 3 PERFORMANCE SPARK PLUG Tohatsu 50HP MD50D2 all * QER617NOR14LGSYTZ634 ReviewbP PP SET OF 3 PERFORMANCE SPARK PLUG Tohatsu 50HP MD50D2 all * QER617NOR14LGSYTZ634 P1. Higher HP and torque by up to 3 P2. increased economy by up to 5P3. 360� Firing TechnologyP4. Improved acceleration by up to 15 P5.