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NGK PMR8B Laser Platinum Spark Plug (6378)
RRP. £37.30£20.75SAVE £16.55 (44%)
NGK PMR8B Spark Plug – Stock No. 6378
The NGK PMR8B is a high-quality resistor spark plug built for clean ignition and long service life. It uses a fine-wire precious metal centre electrode for a strong, reliable spark under load. The projected tip helps improve cold starts and throttle response, especially on tuned or high-compression engines. It is a direct replacement where PMR8B is specified and can offer smoother idle and more consistent performance compared to generic plugs.
- Strong spark and stable combustion thanks to fine-wire centre electrode
- Projected tip aids cold starts and reduces fouling
- Resistor design cuts electrical noise that can affect the ECU
- Built to NGK’s OE standards for durability and heat control
| Part Number | PMR8B |
|---|---|
| NGK Stock Number | 6378 |
| GTIN | 087295163788 |
| Category | 686 – Spark Plug |
| Heat Range (NGK) | 8 |
| Resistor | Yes |
| Thread Diameter | 10 mm |
| Thread Pitch | 1.0 |
| Reach (Thread Length) | 19 mm |
| Hex Size | 14 mm |
| Seat Type | Gasket |
| Electrode Configuration | Fine-wire centre, projected tip |
| Centre Electrode Material | Precious metal (platinum-type) |
| Ground Electrode | Nickel alloy |
| Spark Gap (preset) | 0.7 – 0.8 mm |
| Terminal Type | Solid (non-removable) |
Important: Only use this plug where PMR8B is specified by the manufacturer. Always match heat range, thread, reach, and seat type to your engine.
Compatibility guidance
Fits selected engines that use a 10 mm, long-reach, gasket-seat, projected-tip resistor plug with NGK heat range 8. Use our vehicle lookup or check the Vehicle Fitment tab to confirm it suits your specific model.
The price displayed is for a single plug, please add the desired amount to your basket.
Additional Information
| Weight | 0.05 kg |
|---|---|
| Dimensions | 10 × 3 × 3 cm |
| Brand |
NGK-6378 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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In some instances, extended lead times are unavoidable. This is as labour-intensive and frustrating for us as it is for you, please know we are doing our best to facilitate your modification goals. Abuse of our staff or systems will not be tolerated.
Thank you, Team PP
In the words of the Vehicle Standards Agency (VCA), type approval provides "confirmation that production and samples of a design will meet specified performance standards".
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.
Products on the Progressive Parts website that meet this approval will be clearly marked or labelled EC or ECE approved.