NGK ILFR6J-11K Laser Iridium Spark Plug (4458)
Original price was: £31.20.£20.16Current price is: £20.16.
NGK ILFR6J-11K Laser Iridium Spark Plug – Stock No. 4458
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. A platinum pad on the ground electrode improves durability for long service life.
It is an OE-grade plug built to tight tolerances, suitable for standard and mildly tuned petrol engines. Use one plug per cylinder.
Important: Supplied pre-gapped to 1.1 mm. Check your vehicle’s specification. Avoid forcing the fine-wire electrodes.
Technical specifications
| Part number | ILFR6J-11K |
| NGK stock number | 4458 |
| GTIN | 087295144589 |
| Category | 686 – Spark Plug |
| Type | Laser Iridium (iridium centre, platinum ground pad) |
| 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 |
| Projected tip | Yes |
| Factory gap | 1.1 mm |
| Terminal | Solid |
| Quantity | Sold individually |
| Typical tightening torque | 25-30 Nm for 14 mm gasket seat in aluminium heads |
Fitment guidance
Commonly specified for various Subaru boxer petrol engines. Please use the vehicle lookup to confirm compatibility, or see the Vehicle Fitment tab for full details.
- Benefits: easier cold starts, smoother idle, consistent spark under load, long service intervals.
The price displayed is for a single plug, please add the desired amount to your basket.
| Weight | 0.05 kg |
|---|---|
| Dimensions | 10 × 3 × 3 cm |
| Brand |
NGK-4458 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
UK Shipping
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Out of stock items are sourced from our extended inventory and supplier inventory where possible. These may require manufacturing or carry extended lead times which we endeavour to alert you about if the website hasn't already provided an estimated delivery timescale.
DELIVERY INFORMATION
International Shipping
For accurate pricing, please visit the website checkout which will automatically generate a shipping quote to your country.
If your delivery address is outside of the UK, local tax will be removed and you will have to pay import duties and taxes when the shipment reaches your country.
All international shipments may be subject to cross-border inspections by customs authorities while customs policies vary widely from country to country. You must meet any additional charges for customs clearance and we recommend that you contact your local customs office for further information.
DELIVERY INFORMATION
Returns
Progressive Parts operates a 14 day return period from the date of delivery for unused products.
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Stock at Progressive Parts
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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.
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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.