Kit Content:8 x NGK Spark Plugs Iridium IX NickelItem Description:Center Electrode Core Material: Copper CoreCenter Electrode Tip Material: IridiumGround Configuration: StandardGround Electrode Core Material: Nickel CoreGround Electrode Quantity: 1Ground Electrode Tip Design: Taper Cut OhmsHex Size: 14mmInsulator Height: 53.00 mmManufacturer Heat Range: 6Pre-Gap Size: 0.044 inReach: 26.5 mmResistance: 5000 OhmsSeat Type: TaperedThread Diameter: 0.472 in Brand Name Newparts Item Weight 1.6 Pounds Thread Size 0.472 in Manufacturer Newparts Core Material Nickel Top Material Type Nickel Manufacturer Part Number 372-Set8 OEM Equivalent Part Number 372 Global Trade Identification Number 00196484198873