NGK V-Power Spark Plug WR5 (6 Pack) for MERCURY MONTEGO 1969-1974 4.1L/250

NGK V-Power spark plugs offer economical performance for nearly any automotive application-and they're the only plugs with NGK's V-Groove technology. These plugs enhance ignitability, lower the voltage requirements of ignition systems, and have strong anti-fouling characteristics, while improving fuel mileage and acceleration performance. The V-Power plugs are also highly durable against electrical and chemical wear, making them long-life replacement plugs. Because of the V-Groove, the spark occurs at the edge of the center electrode-so heat is not absorbed by the electrode itself. This allows the flame kernel to expand quickly and efficiently for a complete burn and great performance. Shorty Spark Plug: No. Resistor: Yes. Manufacturer Heat Range: 5. Electrode Tip Material: Nickel alloy. Electrode Core Material: Copper. Insulator Type: Projected. Spark Plug Thread Size: 18mm. Spark Plug Reach: 0.460 in. Spark Plug Seat Style: Tapered. Wrench Diameter: 13/16 in. Ground Strap Quantity: One.

Engine L6, Engine Size 4.1L/250 Engine Family Ford inline 6-cylinder Original equipment manufacturer approved. Trivalent metal plating has superior anti-corrosion and anti-seizing properties Increased fuel economy and lower emissions. Highly durable against electrical and chemical wear Sold In 6 Pack