NGK IFR6Q-G Laser Iridium Spark Plug – Stock No. 5648
This NGK Laser Iridium spark plug delivers reliable ignition, clean combustion, and long service life. The fine iridium centre electrode needs less voltage to spark. That helps cold starts, smooth idle, and strong performance under load. The platinum pad on the ground electrode reduces wear, keeping the gap stable for many miles.
Use this plug as a quality replacement or when refreshing an ignition system during tuning. It is designed to match OEM heat range and specifications. Always confirm fitment with the vehicle lookup on our site or check the Vehicle Fitment tab.
- Fine iridium tip for consistent spark and quicker starts
- Long-life design with platinum ground pad
- Resistor plug to reduce electrical noise and protect electronics
- Factory-set gap to match OEM requirements
| Part Number | IFR6Q-G |
| NGK Stock Number | 5648 |
| GTIN | 087295156483 |
| Category | 686 – Spark Plug |
| Type | Laser Iridium |
| Resistor | Yes |
| Heat Range | 6 (NGK scale) |
| Thread Diameter | M14 x 1.25 |
| Reach (thread length) | 19 mm |
| Seat Type | Flat seat with gasket |
| Hex Size | 16 mm |
| Centre Electrode | Fine iridium tip (approx. 0.6 mm) |
| Ground Electrode | Nickel alloy with platinum pad |
| Spark Gap | Factory preset – do not adjust |
Fitting advice
– Confirm compatibility by vehicle lookup or the Vehicle Fitment tab before ordering.
– Install on a cold engine.
– Tighten to the manufacturer torque spec for M14 gasket-seat plugs.
– If reusing coils, check for cracks and clean the boots.
The price displayed is for a single plug, please add the desired amount to your basket.


