Spark Plug Super Racing Spark Plug - Super Racing - 14 mm Thread - 25 mm Reach - Heat Range 15 - Tapered Seat - Resistor - Each

Spark Plug Super Racing Yttrium Spark Plug - Super Yttrium Racing - 14 mm Thread - 18 mm Reach - Heat Range 15 - Gasket Seat - Resistor - Each

Spark Plug Super Racing Yttrium Spark Plug - Super Yttrium Racing - 14 mm Thread - 19 mm Reach - Heat Range 17 - Gasket Seat - Resistor - Each

Spark Plug - Double Platinum - 14 mm Thread - 1 in Reach - Gasket Seat - Resistor - Each

Spark Plug - Revolution HT - 16 mm Thread - 1 in Reach - Tapered Seat - Resistor - Each

Racing Spark Plug Spark Plug - Racing - 14 mm Thread - 0.750 in Reach - Gasket Seat - Non-Resistor - Each