The NGK 2397 Standard Nickel spark plug is a replacement plug for 1992-2003 Audi, Volkswagen and Mercedes-Benz models. It has M14-1.25 threads, a 0.750 in. reach, a 5/8 in. (16 mm) hex and a heat range of 6. Its nickel alloy center electrode and copper core follow the original equipment design for engines that came with nickel plugs.

NGK 2397 Standard Nickel Spark Plug Features:

• Fits 1992-2003 Audi, Volkswagen and Mercedes-Benz models; see Fitment tab for all applications
• M14-1.25 metric thread with 0.750 in. reach
• 5/8 in. (16 mm) hex
• Flat seat with crush washer installed
• Heat range 6
• 0.040 in. factory pre-gap
• Nickel center electrode tip with nickel ground electrode tip
• 3 ground electrodes
• Resistor type (1000 ohm) for ignition noise suppression
• Non-removable nut terminal
• 1.990 in. insulator height
• Nickel alloy center electrode built to the original equipment design
• Copper core center electrode draws heat away from the firing end
• Alumina silicate ceramic insulator for high dielectric strength
• Trivalent metal plating resists corrosion and thread seizing
• Rolled threads help prevent cross-threading in the cylinder head