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NGK ILTR5A-13G Laser Iridium Spark Plug (3811)
RRP. £23.77£15.37SAVE £8.40 (35%)
NGK ILTR5A-13G Laser Iridium Spark Plug (Stock No. 3811)
The NGK ILTR5A-13G is a Laser Iridium spark plug designed for stable ignition, long life and consistent performance. It uses a fine iridium centre tip for a strong spark with less voltage, helping cold starts, smooth idle and efficient combustion. A platinum pad on the ground electrode reduces wear, so the gap stays stable for longer.
Why choose this plug
- Strong, consistent spark for smoother running and reliable starts
- Iridium centre tip and platinum ground pad for long service life
- Resistor design to reduce electrical noise for the ECU and sensors
- Trivalent plating to resist corrosion and ease removal
| Part number | ILTR5A-13G |
| NGK stock number | 3811 |
| GTIN | 087295138113 |
| Category | 686 – Spark Plug |
| Technology | Laser Iridium (iridium centre tip, platinum ground pad) |
| Heat range | 5 (NGK scale) |
| Thread diameter | 14 mm |
| Thread reach | 26.5 mm |
| Seat type | Taper seat |
| Hex size | 14 mm (9/16 in) |
| Factory gap | 1.3 mm |
| Resistor | Yes |
| Tip projection | Projected |
| Recommended torque | 18-25 Nm for M14 taper seat in aluminium heads |
| Service life (typical) | Up to 60,000-100,000 miles, subject to engine condition |
This model is commonly used across many mid-2000s Ford 3-valve petrol V8 and V10 engines. Please use our vehicle lookup to confirm fitment for your exact car, or check the Vehicle Fitment tab.
Notes: Supplied pre-gapped at 1.3 mm. Always follow the vehicle manufacturer’s gap specification. Do not use anti-seize unless specified by NGK. Install on a cool engine and torque correctly.
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-3811 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.