NGK 7355 Irdium Spark Plug XR5IX

Iridium IX Spark Plug (7355) XR5IX by NGK. NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance, consider upgrading to an NGK Ruthenium HX plug.


Thread Diameter: 14 mm
Thread Pitch: 1.25 mm
Seat Type: Gasket
Reach: 9.5 mm (3/8")
Hex Size: 13/16" (21 mm)
Terminal Type: Solid
Overall Height: ISO
Gap: .039" (1.0 mm)
Center Electrode
Material: Iridium
Type: Fine Wire
Size: 0.6 mm
Projection: Projected
Ground Electrode
Material: Nickel
Type: Standard
Shape: Taper Cut
Resistor: Yes
Resistor Value: 5k Ohm
Heat Range: 5
Features: 3.0 mm Extended Metal Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.
Electrode Material: Iridium
Nominal Gap: 1 mm

• Mfg Part No: 7355 XR5IX
• Related Part No: 7355 XR5IX