NGK BR6FS Spark Plug (4323)
Original price was: £7.93.£3.85Current price is: £3.85.
NGK BR6FS Spark Plug – Stock No. 4323
The NGK BR6FS is a reliable copper-core resistor spark plug for engines that need a 14 mm thread with short reach. It gives steady ignition, resists fouling, and helps the engine start cleanly and run smoothly. It suits many small-capacity engines and classic applications that specify a short-reach, gasket-seat plug.
| Part Number | BR6FS |
|---|---|
| NGK Stock Number | 4323 |
| GTIN | 087295143230 |
| Category | 686 – Spark Plug |
| Thread Diameter | 14 mm |
| Thread Reach | 11.2 mm (short reach) |
| Seat Type | Flat seat with gasket |
| Hex Size | 20.8 mm (13/16 inch) |
| Heat Range | 6 (NGK scale – medium) |
| Resistor | Yes |
| Projected Tip | No |
| Centre Electrode | Copper core, standard type |
| Terminal | Solid terminal |
| Gap | Set to the vehicle or engine maker’s spec |
What it does
– Delivers a strong, consistent spark for reliable combustion.
– Resistor design helps reduce electrical noise that can affect radios and ECUs.
– Copper core sheds heat well to limit fouling and misfires.
Fitment guidance
Often used in motorcycles, marine outboards, powersports, lawn and garden equipment, and some classic cars that require a 14 mm, short-reach, gasket-seat plug with a medium heat range. Use the site’s vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
Always check and set the spark plug gap and tightening torque to your engine’s specification before use.
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-4323 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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DELIVERY INFORMATION
Returns
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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).
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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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Products on the Progressive Parts website that meet this approval will be clearly marked or labelled EC or ECE approved.