NGK Standard Spark Plugs are considered the workhorse, at the heart of smooth-running engines around the world. 2 steps colder than stock for most factory LS applications. FEATURES * OEM Quality * Triple-Gasket Sealing Process * Consistent Performance * Plug of Choice in Millions of Vehicles QUICK SPECS 554: 5K Ohm Center Electrode Core Material: Copper Core Center Electrode Tip Material: Nickel w/ V-groove Gap Size: 0.028 Ground Configuration: Standard Ground Electrode Core Material: Nickel Core Ground Electrode Quantity: 1 Ground Electrode Tip Design: Standard Hex Size: 5/8in Insulator Height: ISO Manufacturer Heat Range: 7 Reach: 17.5mm Resistance: 5K Ohm Seat Type: Tapered Thread Diameter: 0.551
