RACING SPARK PLUGS 4/BOX

Resistor: No,Electrode Type: OEM,Electrode Core Material: Yttrium-Enhanced Alloy,Electrode Tip Material: Platinum,Insulator Type: Non-Projected,Thread Size (IN): 0.551 Inch,Thread Size (MM): 14 Millimeter,Reach: 3/4 Inch,Seat Type: Gasket,Wrench Diameter: 5/8 Inch Cut Back Ground Electrode For Improved Ignitability,Anti-Corrosive Nickel Plating,Large Ground Electrode For Better Heat Transfer,Used By Many Professional Car Drivers,Limited 90 Day Warranty