NGK IZFR6K11 Laser Iridium Spark Plug – Stock No. 6994
This NGK Laser Iridium plug delivers a strong, consistent spark for smooth running and reliable performance. The fine iridium centre electrode needs less voltage to fire, which helps cold starts, stable idle, and clean combustion. It is built for long service life with a precious-metal ground pad to reduce wear.
- Fast starts and smooth idle thanks to a fine iridium tip
- Reliable spark under load for responsive throttle feel
- Long-life design with a platinum ground pad
Key features
– Iridium centre electrode for high ignitability and durability.
– Resistor type to reduce electrical noise that can affect electronics.
– Projected tip to place the spark in the ideal spot for efficient burn.
– Pre-gapped at 1.1 mm for vehicles that specify this setting. Avoid large gap changes on iridium plugs.
Technical specifications
| Part number | IZFR6K11 |
| NGK stock number | 6994 |
| GTIN | 087295169940 |
| Series | Laser Iridium |
| Thread diameter | 14 mm |
| Thread pitch | 1.25 |
| Reach (thread length) | 19 mm |
| Hex size | 16 mm |
| Seat type | Gasket |
| Heat range | 6 (NGK scale) |
| Resistor | Yes |
| Spark gap | 1.1 mm (pre-set) |
| Centre electrode | Fine iridium tip ~0.6 mm |
| Ground electrode | Nickel with platinum pad |
| Tip projection | Projected |
| Recommended tightening | 14 mm gasket seat: 18-25 Nm |
Fitment guidance
Use the vehicle lookup on our site or check the Vehicle Fitment tab to confirm this exact plug grade, reach, seat, and gap match your engine. Mixing the wrong reach or seat type can cause damage.
The price displayed is for a single plug, please add the desired amount to your basket.


