NGK IMR9B-9H Laser Iridium Spark Plug (4888)
Original price was: £44.06.£27.52Current price is: £27.52.
NGK IMR9B-9H Iridium Spark Plug (Stock No. 4888)
The NGK IMR9B-9H is a fine-wire iridium spark plug designed for strong, consistent ignition under high load and high temperatures. It helps the engine start cleanly, idle smoothly, and maintain stable performance when driven hard. The resistor design reduces electrical noise that can affect sensitive electronics.
Use this plug as a like-for-like replacement where IMR9B-9H is specified by the engine manufacturer. If you are tuning or running higher boost, this heat range can offer added knock resistance compared to warmer plugs, but always follow your tuner’s advice.
- Fine-wire iridium centre electrode for a strong, reliable spark
- Resistor construction to protect ECU and sensors from interference
- Heat range 9 for high-temperature stability under performance use
| Part number | IMR9B-9H |
| NGK stock number | 4888 |
| GTIN | 087295148884 |
| Category | 686 – Spark Plug |
| Centre electrode | Fine-wire iridium |
| Ground electrode | Nickel alloy |
| Resistor | Yes |
| Heat range | 9 (NGK scale) |
| Factory gap | 0.9 mm (-9 specification) |
Important: Check your owner’s manual or use the site’s vehicle lookup to confirm fitment. Use the torque and gap specified by your engine manufacturer. Do not force-fit or cross-thread.
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-4888 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).
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.
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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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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
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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.