Compare Motorcraft Copper Spark Plug - SP406X Part #: SP406X Line: MOT Motorcraft Copper Spark Plug 2 Year LIMITED WARRANTY Seat: Gasket Thread Size: M14 Heat Range: 275 Hex Size (mm): 16mm Hex Size (in): 5/8 Inch Preset Gap (in): 0.050 Inch Preset Gap (mm): 1.28mm Thread Reach (in): 0.750 Inch Resistor Plug: Yes Center Electrode Core Material: Copper Center Electrode Tip Material: Nickel Approximate Resistor Value (Ohm): 2000 To 12000 Ohm Insulator Height (mm): 50.98mm Insulator Height (in): 2.007 Inch Ground Electrode Tip Material: Nickel Thread Reach (mm): 19.05mm Metallurgy: Copper Show More Show Less
Compare Motorcraft Copper Plug Number AGSP33CAX Spark Plug - SP445AX Part #: SP445AX Line: MOT Motorcraft Copper Plug Number AGSP33CAX Spark Plug 2 Year LIMITED WARRANTY Seat: Tapered Thread Size: M14 Heat Range: 275 Hex Size (mm): 16mm Hex Size (in): 5/8 Inch Preset Gap (in): 0.044 Inch Preset Gap (mm): 1.12mm Thread Reach (in): 0.748 Inch Center Electrode Core Material: Copper Center Electrode Tip Material: Nickel Approximate Resistor Value (Ohm): 3000 To 12000 Ohm Insulator Height (mm): 50.5mm Insulator Height (in): 1.988 Inch Ground Electrode Tip Material: Nickel Thread Reach (mm): 19mm Service Number: AGSP33CAX Metallurgy: Copper Show More Show Less