NGK ZFR7F-11 Spark Plug – Stock No. 2975
The NGK ZFR7F-11 is a reliable, nickel alloy spark plug designed for stable ignition and everyday performance. It delivers a clean, consistent spark and copes well with heat, making it a solid choice for standard and lightly tuned petrol engines.
Heat range 7 is on the colder side, which can help manage temperatures in engines that run hotter than stock. The 1.1 mm preset gap suits many factory ignition systems for smooth idle and good throttle response.
Always check your vehicle’s service manual for the correct plug type and gap, and confirm fitment using our vehicle lookup or the Vehicle Fitment tab.
| Part Number | ZFR7F-11 |
| NGK Stock Number | 2975 |
| GTIN | 087295129753 |
| Category | 686 – Spark Plug |
| Thread Diameter | 14 mm |
| Thread Pitch | 1.25 |
| Reach (Thread Length) | 19 mm |
| Hex Size | 16 mm (5/8 inch) |
| Seat Type | Gasket |
| Heat Range | 7 (colder) |
| Resistor | Yes |
| Electrode Material | Nickel alloy |
| Tip Style | Projected |
| Factory Gap | 1.1 mm |
Why choose this plug
- Stable spark for smooth idle and clean combustion.
- Colder heat range helps control plug temperatures in hard-driven or mildly tuned engines.
- Durable nickel centre electrode for dependable service life.
If you are upgrading from a standard heat range, expect small gains in consistency rather than power. Correct heat range, gap, and torque are key to performance and reliability. Use our vehicle lookup or check the Vehicle Fitment tab to confirm it suits your engine.
The price displayed is for a single plug, please add the desired amount to your basket.


