RACING PLUGS 4/BX

Resistor: Yes Electrode Type: OEM Electrode Core Material: Copper Electrode Tip Material: Chromium Nickel Alloy Insulator Type: Projected Thread Size (IN): 0.551 Inch Thread Size (MM): 14 Millimeter Reach: 0.433 Inch Seat Type: Tapered Wrench Diameter: 5/8 Inch Quantity: Single Cut Back Ground Electrode For Improved Ignitability Anti-Corrosive Nickel Plating Large Ground Electrode For Better Heat Transfer Used By Many Professional Car DriversLimited 90 Day Warranty