NGK Spark Plug Stock # 7177 Spark Plug - NGK Iridium IX - 14 mm Thread - 0.460 in Reach - Tapered Seat - Stock Number 7177 - Resistor - Each

NGK Spark Plug Stock # 6681 Spark Plug - NGK Laser Iridium IX - 12 mm Thread - 0.749 in Reach - Gasket Seat - Stock Number 6681 - Resistor - Each

NGK Spark Plug Stock # 3452 Spark Plug - NGK Laser Platinum - 14 mm Thread - 0.749 in Reach - Gasket Seat - Stock Number 3452 - Resistor - Each

NGK Spark Plug Stock 4998 Spark Plug - 14 mm Thread - 25.00 in Reach - Gasket Seat - Resistor - Each

NGK Spark Plug Stock # 6668 Spark Plug - NGK V-Power - 14 mm Thread - 26.5 mm Reach - Gasket Seat - Stock Number 6668 - Resistor - Each

NGK Spark Plug Stock # 97292 Spark Plug - Ruthenium HX - 12 mm Thread - 26.5 mm Reach - Gasket Seat - Stock Number 97292 - Resistor - Each