NGK BR7EIX Iridium IX Spark Plug (6664)
Original price was: £25.55.£14.53Current price is: £14.53.
NGK BR7EIX Iridium IX Spark Plug – 6664
The NGK BR7EIX is a high-quality iridium spark plug designed for reliable ignition and steady combustion. It uses a fine iridium centre electrode for a strong spark with lower voltage demand. This helps cold starts, throttle response, and consistency under load.
The heat range 7 is a popular choice for tuned or hard-worked engines that need a slightly colder plug than standard. The resistor design helps reduce electrical noise that can affect the ECU and sensors.
Suitable for many two-stroke motorcycles and some small four-stroke applications that specify a 14 mm long-reach, non-projected, resistor plug in NGK heat range 7. Use the vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
- Fine iridium tip for durable, consistent spark
- Resistor type to reduce electrical interference
- Colder NGK 7 heat range for performance and sustained high-load use
| Part Number | BR7EIX |
| NGK Stock Number | 6664 |
| GTIN | 087295166642 |
| Category | 686 – Spark Plug |
| Type | Iridium IX, resistor |
| Thread Size | M14 x 1.25 |
| Thread Reach | 19 mm (3/4 in) |
| Hex Size | 20.8 mm (13/16 in) |
| Seat Type | Flat seat with gasket |
| Heat Range (NGK) | 7 |
| Centre Electrode | Iridium tip ~0.6 mm |
| Ground Electrode | Nickel alloy |
| Projected Tip | No (standard reach/position) |
| Terminal Type | Solid terminal |
| Factory Gap | 0.8 mm (check and adjust to OE spec) |
| Tightening Torque | 25-30 Nm (14 mm thread, gasket seat) |
| Tightening Angle (new plug) | 1/2 turn after gasket contacts seat |
| Construction | Trivalent anti-corrosion plating, copper core |
Note: Always set the gap and torque to the vehicle maker’s specification. Use only where BR7EIX is specified or recommended as an equivalent.
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-6664 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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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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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.