NGK Spark Plug Stock # 3207 Spark Plug - NGK G-Power Platinum - 14 mm Thread - 0.460 in Reach - Tapered Seat - Stock Number 3207 - 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

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 # 7599 Spark Plug - NGK Standard - 10 mm Thread - 0.500 in Reach - Gasket Seat - Stock Number 7599 - Resistor - Each

NGK Spark Plug Stock # 7022 Spark Plug - NGK Standard - 14 mm Thread - 0.500 in Reach - Gasket Seat - Stock Number 7022 - Resistor - Each