Iridium TT spark plugs offer improved horsepower and reduced fuel consumption
0.4mm diameter iridium alloy center electrode
0.7mm needle-type platinum alloy ground electrode
Iridium tip is fully protected by a laser welding
Reduced CO, CO2 and HC emissions due to improved ignition spark
Built-in resistor to eliminate electromagnetic noise interference
Lasts beyond 100,000 miles for ultimate endurance