The Spark Plug Serious Enthusiasts Rely On.
Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling.
Fine Iridium tip ensures high durability and a consistently stable spark. Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines.
“Trivalent Metal Plating” has superior anti-corrosion and anti-seizing properties.
Outstanding acceleration, high fuel efficiency and durability.
Ultimate design, technology and performance.
- Resistor: Yes
- Manufacturer Heat Range: 4
- Electrode Core Material: Copper
- Electrode Tip Material: Iridium
- Insulator Type: Projected
- Spark Plug Thread Size: 14mm
- Spark Plug Reach: 25mm
- Spark Plug Seat Style: Tapered
- Wrench Diameter: 5/8 in.
- Ground Strap Quantity: One
- NGK Part Number: LZTR4AIX-11
- Quantity: 16 Spark Plugs
- Notes: Wide gap spark plug of 1.1mm.