NGK Spark Plug Stock # 2633 Spark Plug - NGK Standard - 14 mm Thread - 0.500 in Reach - Gasket Seat - Stock Number 2633 - Resistor - Each

NGK Spark Plug Stock # 5887 Spark Plug - NGK Laser Iridium - 14 mm Thread - 0.749 in Reach - Gasket Seat - Stock Number 5887 - Resistor - Each

NGK Spark Plug Stock # 9198 Spark Plug - NGK Iridium IX - 10 mm Thread - 0.749 in Reach - Gasket Seat - Stock Number 9198 - Resistor - Each

NGK Spark Plug Stock # 96355 Spark Plug - Ruthenium HX - 14 mm Thread - 26.5 mm Reach - Gasket Seat - Stock Number 96355 - Resistor - Each

NGK Spark Plug Stock # 94705 Spark Plug - Ruthenium HX - 12 mm Thread - 26.5 mm Reach - Gasket Seat - Stock Number 94705 - Resistor - Each

NGK Spark Plug Stock # 5018 Spark Plug - NGK G-Power Platinum - 14 mm Thread - 26.5 mm Reach - Gasket Seat - Stock Number 5018 - Resistor - Each