Set of 5 Genuine NGK 6578 Spark Plugs BPR4ES

Center Electrode Core Material: Copper Core
Center Electrode Material: Nickel
Gap: 0.032"
Ground Configuration: Standard
Ground Electrode Core Material: Nickel Core
Ground Electrode Material: Nickel
Ground Electrode Quantity: 1
Ground Electrode Tip Design: Standard
Heat Range: 4
Hex Size: 4/5"
Insulator Height: 55 mm
Longevity: 30k Miles
Overall Height: ISO
Resistance: 5 kOhm
Spark Plug Seat Style: Flat
Thread Reach: 0.75"
Thread Size: 0.551"
Thread Size: 14 mm