NGK BPR8EIX Iridium IX Spark Plug (6684)
Original price was: £24.90.£14.13Current price is: £14.13.
NGK Iridium IX Spark Plug – BPR8EIX (Stock No. 6684)
The NGK BPR8EIX is a cold heat-range Iridium IX spark plug designed for reliable ignition under high load and high temperature. It uses a fine-wire iridium centre electrode for a strong, stable spark and improved resistance to fouling. Ideal where a colder plug is specified, such as tuned or hard-driven engines.
It helps with easier starting, smoother idle, and consistent performance over a long service life. The projected tip improves flame kernel position, while the built-in resistor reduces electrical noise that can affect electronics.
Always confirm fitment by using the vehicle lookup or checking the Vehicle Fitment tab. Heat range 8 is colder than many standard road plugs.
- Fine-wire iridium tip for strong spark and long life
- Colder heat range for sustained high-load use
- Gasket seat and projected tip for stable combustion
| Part Number | BPR8EIX |
| NGK Stock Number | 6684 |
| Category | 686 – Spark Plug |
| GTIN | 087295166840 |
| Thread Size | M14 |
| Thread Pitch | 1.25 |
| Reach (thread length) | 19 mm |
| Seat Type | Gasket |
| Hex Size | 20.8 mm (13/16 in) |
| Heat Range | 8 (cold) |
| Resistor | Yes |
| Centre Electrode | Iridium, fine wire (~0.6 mm) |
| Ground Electrode | Nickel alloy, tapered cut |
| Tip Style | Projected |
| Factory Gap | 0.8 mm (check and adjust to spec) |
| Terminal | Removable terminal nut |
| Recommended Tightening | 25 – 30 Nm (14 mm gasket seat) |
Fitment Guidance
This is a colder-grade plug commonly specified for high-performance use in engines that call for M14 x 1.25, 19 mm reach, gasket seat, projected tip. Use the site’s vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
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-6684 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
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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.
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DELIVERY INFORMATION
Returns
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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).
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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.