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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.
| Ground Electrode Quantity | 1 |
| Insulator Type | Projected |
| Spark Plug Reach | 19 mm |
| Sub Brand | Iridium IX |
| VMRS Code | 033003005 |
| Spark Plug Resistor Value | 5000 |
| Quality Level | Best |
| Spark Plug Heat Range | NGK5 |
| Seat Type | Flat |
| Manufacturer | NGK Spark Plug |
| Resistor Type | Yes |
| Spark Plug Hex Size | 18 mm |
| SDS Required | No |
| Manufacturer Part Number | ZFR5FIX-11 |
| Terminal Type | Non-removable Nut |
| Spark Plug Seat Type | Gasket |
| Spark plug Inductive | No |
| Thread Size | M14-1.25 |
| Brand | NGK |
| Spark Plug Thread Size | 14 mm |
| Contents | Iridium tipped spark plug w/gasket |
| Gap Size | .044 in |
| Electrode Core Material | Copper |
| Insulator Material | Ceramic |
| Spark Plug Resistor | Yes |
| Hex Size | 5/8 in |
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