NGK Iridium IX Spark Plugs (8-Pack) - Compatible with Buick, Chevrolet, Cadillac, Ford - High Performance Ignition for Smooth Engine Operation - Ideal for Daily Commuting, Road Trips & Performance Tuning

Kit Content:8 x NGK Spark PlugsItem Description:Center Electrode Core Material: Copper CoreCenter Electrode Tip Material: IridiumGround Configuration: StandardGround Electrode Core Material: Nickel CoreGround Electrode Quantity: 1Ground Electrode Tip Design(Ohms): Taper CutHex Size: 5/8"Insulator Height(mm): 55.00Manufacturer Heat Range: 4Pre-Gap Size(in): 0.040Reach(in): 0.46Resistance(Ohms): 5000Seat Type: TaperedThread Diameter(in): 0.551