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NGK IFR6J11 Laser Iridium Spark Plug (7658)
Original price was: £31.08.£20.07Current price is: £20.07.
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NGK IFR6J11 – Laser Iridium Spark Plug (Stock No. 7658)
The NGK IFR6J11 is a premium Laser Iridium spark plug designed for stable ignition, long life, and consistent performance. It uses a fine iridium centre electrode and a platinum pad on the ground strap to resist wear and maintain a clean, strong spark over high mileage.
Cold starts are smoother, throttle response is sharper, and misfires are reduced. It is a direct replacement where IFR6J11 is specified by the manufacturer.
- Fine iridium tip for reliable ignition and cleaner burn
- Long service life due to iridium centre and platinum ground
- Resistor design to reduce electrical noise affecting the ECU
- Pre-set 1.1 mm gap for easy installation
| Part number | IFR6J11 |
|---|---|
| NGK stock number | 7658 |
| Category | 686 – Spark Plug |
| GTIN | 87295176580 |
| Type | Laser Iridium – iridium centre, platinum ground |
| Thread diameter | 14 mm |
| Reach (thread length) | 19 mm |
| Hex size | 16 mm |
| Seat type | Flat seat with gasket |
| Heat range | 6 (NGK scale) |
| Resistor | Yes |
| Gap | 1.1 mm – factory set |
| Centre electrode | Fine wire iridium, approx. 0.6 mm |
| Ground electrode | Nickel with platinum pad |
| Terminal type | Solid terminal |
| Typical tightening torque | 25 Nm for 14 mm gasket seat (aluminium head) |
Fitment guidance
Fits various petrol engines that specify NGK IFR6J11 from the factory. This includes many Japanese applications using 14 mm, 19 mm reach gasket-seat plugs. Use the vehicle lookup to confirm fitment or check the Vehicle Fitment tab.
Installation tips: Always fit to a cool engine. Start by hand to avoid cross-threading. If using torque, follow the spec above. If installing without a torque wrench, tighten to seat the gasket, then turn a further 1/2 to 2/3 turn. Do not forcefully regap fine wire iridium plugs.
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-7658 Confirmed Fitment
Our team haven't provided any fitment data for this product yet, please get in touch or check back later!
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.
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Thank you, Team PP
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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.
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