BPERFORMANCE SPARK PLUG Harley Davidson FLSTF Softail Fat Boy EFI (2008-2007) * GFRT712BR14ZCYU801 ReviewbP PP PERFORMANCE SPARK PLUG Harley Davidson FLSTF Softail Fat Boy EFI (2008-2007) * GFRT712BR14ZCYU801 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.