NGK LTR6DI-8 Double Iridium Spark Plug (Stock No. 96588)
This NGK double iridium spark plug delivers a clean, stable spark for reliable ignition and long life. The fine-wire iridium centre electrode needs less voltage to fire, which helps cold starts and smooth idle. It also resists wear, so performance stays consistent for longer service intervals.
The -8 gap (0.8 mm) suits many modern petrol engines running standard to mildly tuned setups. It is a good, all-round heat range for daily use with occasional spirited driving.
Use the site’s vehicle lookup or the Vehicle Fitment tab to confirm fitment.
| Specification | Detail |
|---|---|
| Part Number | LTR6DI-8 |
| NGK Stock Number | 96588 |
| Category | 686 – Spark Plug |
| GTIN | 087295865880, 087295965887 |
| Type | Double Iridium (iridium centre, precious-metal ground) |
| Heat Range | 6 (NGK scale) |
| Gap | 0.8 mm (preset) |
| Thread Diameter | 14 mm |
| Thread Pitch | 1.25 |
| Reach (thread length) | 19 mm |
| Hex Size | 16 mm |
| Seat Type | Flat seat with gasket |
| Resistor | Yes (RFI suppression) |
| Projected Tip | Yes |
| Centre Electrode | Fine-wire iridium |
| Ground Electrode | Precious-metal pad |
| Recommended Torque | 18-25 Nm (14 mm gasket seat, aluminium head) |
Why choose this plug
- Sharper spark for better combustion and throttle response.
- Strong performance under load and at high temperatures.
- Long service life thanks to durable iridium and precious-metal pad.
Important: Always confirm thread size, reach and heat range for your engine before installation. Check the Vehicle Fitment tab or use the site’s vehicle lookup.
The price displayed is for a single plug, please add the desired amount to your basket.


