NGK DILTR6A8G Laser Iridium Spark Plug (Stock No. 90738)
This NGK Laser Iridium plug delivers consistent ignition, smoother idle, and clean combustion. It uses a fine iridium centre electrode and a platinum-tipped ground for strong spark and long life. Ideal for tuned or standard petrol engines that specify this exact plug.
The iridium tip needs less voltage to fire. That helps cold starts and keeps performance stable under load. The platinum pad reduces wear, so service intervals can be longer than with standard copper plugs. The plug is factory-gapped for accuracy.
Use this part only where specified by the vehicle manufacturer. If you are unsure, use our vehicle lookup or check the Vehicle Fitment tab.
- Stable spark under boost and high load
- Improved throttle response and idle quality
- Long service life with minimal gap wear
| Part number | DILTR6A8G |
|---|---|
| NGK stock number | 90738 |
| Category | 686 – Spark Plug |
| GTIN | 87295907382 |
| Type | Laser Iridium (double precious metal) |
| Heat range | 6 (NGK scale) |
| Resistor | Yes |
| Centre electrode | Fine-wire iridium alloy |
| Ground electrode | Nickel base with welded platinum pad |
| Tip projection | Projected core nose |
| Factory gap | 0.8 mm |
| Suitable fuel | Petrol (including turbocharged engines where specified) |
Note: The factory-set gap is precise. Avoid re-gapping iridium plugs. Tighten to the vehicle maker’s torque spec using a calibrated torque wrench.
The price displayed is for a single plug, please add the desired amount to your basket.


