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Laser Welded Iridium Precision for High Heat Engines
Built for engines that run hot, this laser iridium plug pairs a fine wire iridium center electrode with a taper cut ground electrode to reduce quenching and improve flame travel. The laser welded construction resists electrode wear so the gap stays consistent for longer between services.
Key Features
- Laser welded fine wire iridium center electrode for a strong, focused spark
- Taper cut ground electrode reduces quenching and improves flame kernel growth
- Trivalent metal plating on the shell resists corrosion and seizing
- Resistor design suppresses radio and electronic interference
- Engineered for high heat range applications where reliability matters most
Specifications
| Detail | Value |
|---|---|
| Gap | 0.7mm |
| Heat Range | 8 |
| Thread Size | M12 x 1.25 |
| Reach | 26.5mm |
| Hex Size | 5/8 in (16mm) |
| Resistor | Yes |
What's Included
- 4 NGK ILKR8Q7 Laser Iridium spark plugs
About NGK
NGK is a global leader in ignition technology, and its Laser Iridium line uses a laser welding process to fuse iridium wire to the electrode tip for exceptional durability under high combustion temperatures.
Related Parts
- NGK Iridium Long Life Spark Plug Box of 4 (ILKR8E6)
- NGK Iridium Stock Heat Spark Plug Box of 4 (LZTR5AIX-13)
- NGK Iridium Spark Plug Box of 4 (IZTR5B11)
FAQ
What is the NGK ILKR8Q7?The NGK ILKR8Q7 is a Laser Iridium spark plug with a heat range of 8, a 0.7mm gap, and an M12 x 1.25 thread. It uses a laser welded fine wire iridium center electrode for long term durability in high heat applications.
What gap does this spark plug use?This plug uses a 0.7mm gap, tighter than many standard plugs, which is common for high heat range turbocharged or performance applications.
What thread size does this plug use?It uses an M12 x 1.25 thread with a 26.5mm reach and 5/8 inch hex size.
Why choose a Laser Iridium plug over a standard nickel plug?The laser welded iridium tip resists electrode erosion far better than nickel alloy, helping the plug maintain its factory gap and spark quality over a longer service interval.
Does this spark plug include a resistor?Yes, this plug includes an internal resistor to help suppress radio and electronic interference.
How many plugs come in this box?This listing includes a box of 4 spark plugs.
Is this spark plug suited for turbocharged engines?Its heat range 8 rating and tight 0.7mm gap make it a common choice for high heat, high boost applications, though you should confirm your engine manufacturer specification before installing.
Install Instructions
- Allow the engine to cool completely before starting work
- Remove the ignition coil, coil pack, or spark plug wire
- Use a spark plug socket to remove the old plug, turning counterclockwise
- Verify the gap on the new plug matches manufacturer specification
- Thread the new plug in by hand until seated, then torque to specification
- Reconnect the coil, coil pack, or wire before starting the engine
Engine
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NGK
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