Kit Content:1 x NGK HEI Ignition Coil4 x NGK Ruthenium HX Spark PlugsItem Description:Thread Diameter(mm): (Spark Plugs) 14.00Coil Type: (Ignition Coil) HEITerminal Type: (Ignition Coil) BladeCenter Electrode Core Material: (Spark Plugs) CopperElectrical Terminal Type: (Spark Plugs) Non-Removable NutGround Electrode Quantity: (Spark Plugs) 1Center Electrode Tip Material: (Spark Plugs) RutheniumTerminal Quantity: (Ignition Coil) 2Ground Electrode Core Material: (Spark Plugs) NickelReach(in): (Spark Plugs) .75Insulator Height(mm): (Spark Plugs) 50.50Ground Configuration: (Spark Plugs) StandardIgnition Type: (Ignition Coil) ElectronicPre-Gap Size(in): (Spark Plugs) .044Hex Size(in): (Spark Plugs) 5/8Mounting Bracket Included: (Ignition Coil) NoManufacturer Heat Range: (Spark Plugs) 5Ground Electrode Tip Design: (Spark Plugs) Dual Fine Electrode - High IgnitabilitySeat Type: (Spark Plugs) FlatResistance(Ohms): (Spark Plugs) 5000