NGK 7373 FR5 V-Power Spark Plugs - Qty 8 Spark Plugs - V-Power; Pre-Set Gap: 0.040" - V-Power Spark Plugs are named for their specially designed v-groove center electrode to improve ignitability. Tested to the highest original equipment standards, these plugs are crucial for vehicle maintenance. - Features & Benefits: Cold-rolled threads prevent cross-threading and damage to cylinder heads; Trivalent Metal Plating has superior anti-corrosion and anti-seizing properties (eliminates need for anti-seize); High-grade alumina silicate ceramic creates a stronger insulator to reduce dielectric punch-through (caused by spark exiting through side of ceramic); 98% pure copper core increases heat dissipation for reliable starts and prevents spark plug overheating; 90-degree V-Groove center electrode allows the spark to occur closer to the outside of both the center and ground electrodes for better flame expansion, reducing quenching and improving ignitability. - Specifications: Center Electrode Core Material: Copper / Center Electrode Tip Material: Nickel / Electrical Terminal Type: Non-Removable Nut / Gap Size (IN): 0.040 / Ground Configuration: Standard / Ground Electrode Core Material: Nickel / Ground Electrode Quantity: 1 / Ground Electrode Tip Design: Standard / Hex Size (IN): 5/8 / Insulator Height (mm): 50.50 / Manufacturer Heat Range: 5 / Part Number: FR5 / Reach (IN): 0.75 / Resistance (ohms): 5000 / Seat Type: Flat / Stock Number: 7373 / Thread Diameter (MM): 14.00