Kit Content:4 x DENSO Direct Ignition Coils4 x NGK Standard Spark PlugsItem Description:Center Electrode Core Material: (Spark Plugs) Copper CoreCenter Electrode Tip Material: (Spark Plugs) NickelColor: (Direct Ignition Coils) GrayGround Configuration: (Spark Plugs) StandardGround Electrode Core Material: (Spark Plugs) Nickel CoreGround Electrode Quantity: (Spark Plugs) 1Ground Electrode Tip Design(Ohms): (Spark Plugs) StandardHex Size: (Spark Plugs) 5/8"Insulator Height(mm): (Spark Plugs) 50.5Manufacturer Heat Range: (Spark Plugs) 5Pre-Gap Size(in): (Spark Plugs) 0.044Reach(in): (Spark Plugs) 0.75Resistance(Ohms): (Spark Plugs) 5000Seat Type: (Spark Plugs) GasketThread Diameter(in): (Spark Plugs) 0.551Voltage(VDC): (Direct Ignition Coils) 12