With enhanced throttle response, exceptional anti-fouling properties, and high ignitability, Iridium IX® is the perfect choice for performance enthusiasts. Designed to withstand the intense heat of modern high-performance engines, its ultra-high melting point ensures excellent acceleration, fuel efficiency, and long-lasting durability.
Fine iridium tip delivers reliable durability and consistently stable sparks
Trivalent metal plating offers excellent resistance to corrosion and seizing
Optimized for rapid acceleration, fuel economy, and long-term performance
 
Laser Iridium spark plugs are engineered in collaboration with OEMs to meet each manufacturer's exacting standards for quality and durability. Built with high-grade alumina silicate ceramic and precision fine-wire center electrodes, the Laser Series delivers original equipment performance tailored for every engine.
 
Features:
High-grade alumina silicate ceramic - Creates a stronger insulator to reduce dielectric punch-through (Caused by spark exiting through the side of the ceramic)
Cold-Rolled Threads - Prevents cross-threading and damage to cylinder heads
98% Pure Copper Core - Increased heat dissipation for reliable starts, prevents spark plug overheating
Trivlent Plating - No anti-seize required
Tapered-cut Ground Electrode - Higher ignitability & reduced quenching
 
Increased Heat Dissipation
The Combination of NGK's high-grade pure alumina ceramic and 98% pure copper core enables the spark plug to dissipate large amounts of heat quickly. This ultra-wide heat range prevents the spark plug from overheating while providing reliable starts.
 
Higher Ignitability
The "Quenching Effect" is where the cooler center and ground electrodes drain the flame core's energy through heat transfer. If quenching is severe,  the flame core can be extinguished, causing ignition to fail. These plugs reduce this quenching effect, resulting in better ignition performance. 
 
All NGK Spark Plugs must pass extensive testing procedures and quality checks to ensure fit & performance. 
Combustion pressure testing to maintain stable performance (Fig. 4)
Acceleration testing for improved acceleration performance (Fig. 5)
Mechanical vibration testing 
Thermal shock testing to -40°F
Tightest resistor manufacturing process in the industry
Manufactured in an ISO 11565 certified facility
Gap measurement with laser precision throughout the manufacturing process
Center electrodes are accurately positioned with 360° welding process