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

NGK Spark Plug Stock # 4904 Spark Plug - NGK Laser Iridium - 14 mm Thread - 26.5 mm Reach - Gasket Seat - Stock Number 4904 - Resistor - Each

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 # 5555 Spark Plug - NGK Laser Platinum - 14 mm Thread - 0.749 in Reach - Gasket Seat - Stock Number 5555 - Resistor - Each