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NGK ZFR6F-11 Nickel Spark Plug (4291)
RRP. £8.06£4.57SAVE £3.49 (43%)
NGK ZFR6F-11 Spark Plug – Stock No. 4291
This NGK spark plug delivers reliable ignition and consistent performance for everyday driving and light tuning. It uses a copper core for better heat transfer and a durable nickel alloy tip. The factory 1.1 mm gap helps stable cold starts, smooth idle, and clean combustion.
- Strong spark for smooth running and dependable starts
- Resistor design reduces radio interference and protects sensitive electronics
- Heat range 6 suits standard and mildly tuned petrol engines
| Part Number | ZFR6F-11 |
| NGK Stock Number | 4291 |
| GTIN | 087295142912 |
| Category | 686 – Spark Plug |
| Thread Diameter | 14 mm |
| Thread Pitch | 1.25 |
| Reach (Thread Length) | 19 mm |
| Hex Size | 16 mm (5/8 in) |
| Seat Type | Gasket |
| Resistor | Yes |
| Heat Range | 6 (NGK scale) |
| Spark Gap | 1.1 mm (factory set) |
| Centre Electrode | Nickel alloy with copper core |
| Ground Electrode | Nickel, single ground |
| Terminal | Solid type |
Fitment guidance
Use the vehicle lookup on our site or check the Vehicle Fitment tab to confirm this plug matches your engine’s thread size, reach, heat range, and gap requirements.
Installation notes
– Check and adjust gap only if your manufacturer specifies a different setting.
– Tightening torque for 14 mm gasket-seat plugs: typically 18-25 Nm.
Do not over-tighten – this can damage threads or the plug.
The price displayed is for a single plug, please add the desired amount to your basket.
Additional Information
| Weight | 0.05 kg |
|---|---|
| Dimensions | 10 × 3 × 3 cm |
| Brand |
NGK-4291 Confirmed Fitment
Please note, this information is a combination of supplier provided compatibility data and our workshop expertise. While every effort has been made to ensure the accuracy of this information Progressive Parts Ltd are not liable for abnormalities or inaccurate data. Customers are wholly responsible for checking fitment for their vehicle. More information is available from our Terms & Conditions
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Stock at Progressive Parts
Delivery timescales are given as estimates in good faith, but cannot be taken as precise or exact information. We highly advise against booking installation/workshop time or engaging in preparatory work until you've received and inspected the goods.
What do our stock statuses mean?
1+ IN STOCK in green stock is readily available in one of our warehouses for express delivery (at the time of viewing).
LOW STOCK in green means we're running low! 1 or 2 left on the shelf so act fast. Over evenings, weekends and bank holidays this stock can move quickly so please bear this in mind.
0 IN STOCK in blue means our primary warehouse does not have unallocated stock, but our UK partners do. Often these can be shipped quickly and efficiently. You'll be notified via the Track My Order page if further delays are unavoidable.
MADE TO ORDER in blue means we've partnered with a supplier which primarily makes their products to order. It's not on our shelf, but your order goes into production immediately.
0 IN STOCK in orange means everybody we work with is unfortunately out of stock. Stock is not available in the UK. The best course of action is to place an order to create an allocation from the next batch arriving.
OUT OF STOCK in red. This product is unavailable to order, for whatever reason we're unable to obtain stock or there is an issue with supply/lead times.
We're tuners too!
Our staff are car enthusiasts, we understand the need for speed... This includes getting your orders out the door as quickly and securely as possible!
In some instances, extended lead times are unavoidable. This is as labour-intensive and frustrating for us as it is for you, please know we are doing our best to facilitate your modification goals. Abuse of our staff or systems will not be tolerated.
Thank you, Team PP
In the words of the Vehicle Standards Agency (VCA), type approval provides "confirmation that production and samples of a design will meet specified performance standards".
For emissions components this encompasses noise, emissions and balanced back pressure, which have a strong influence on maintaining engine performance (power), and fuel efficiency. Type approval ensures that an aftermarket component will reach, or exceed the performance standard of the corresponding OE part.
Type-approval then, is a certain guarantee that an end user will receive a product of OE equivalent performance attributes.
Products on the Progressive Parts website that meet this approval will be clearly marked or labelled EC or ECE approved.