Spark Plug – Iridium Performance – 14 mm Thread – 25 mm Reach – Heat Range 15 – Tapered Seat – Resistor – Each

Spark Plug – Iridium Performance – 14 mm Thread – 25 mm Reach – Heat Range 17 – Tapered Seat – Resistor – Each

Spark Plug – Iridium Performance – 14 mm Thread – 26.5 mm Reach – Heat Range 15 – Gasket Seat – Resistor – Each

Spark Plug – Iridium Performance – 14 mm Thread – 19 mm Reach – Heat Range 15 – Gasket Seat – Resistor – Each

Spark Plug – Iridium Performance – 14 mm Thread – 19 mm Reach – Heat Range 17 – Gasket Seat – Resistor – Each

Spark Plug – Iridium Performance – 12 mm Thread – 26.1 mm Reach – Heat Range 14 – Gasket Seat – Resistor – Each

Spark Plug – Iridium Racing – 14 mm Thread – 19 mm Reach – Heat Range 12 – Gasket Seat – Resistor – Each

Spark Plug – Iridium Racing – 14 mm Thread – 19 mm Reach – Heat Range 14 – Gasket Seat – Resistor – Each