NGK 6418

The improved throttle response, superior anti-fouling and high-ignitability makes Iridium IX® ideal for the performance enthusiast. Iridium's extremely high melting point is perfectly suited to today's high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability.

Features & Benefits:

• Fine Iridium tip ensures high durability and a consistently stable spark
• Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
• Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties
• Tapered ground electrode increases ignitability and minimizes quenching
• High-grade alumina silicate ceramic creates a stronger insulator to reduce dielectric punch-through (caused by spark exiting through side of ceramic)
• Cold-rolled threads prevent cross-threading and damage to cylinder heads

Which NGK Spark Plug Is Right For You?

Material / Series	Lifespan / Durability	Performance / Ignitability	Efficiency / Fuel Economy
Copper / Nickel V-Power	★	★	★
Platinum G-Power	★★	★★★★	★
Double Platinum Laser	★★★★★	★★	★★
Iridium IX	★★★	★★★★★	★★
Iridium Laser	★★★★★★	★★★★	★★★
Ruthenium HX	★★★★★★★	★★★★★	★★★★

Videos

Closeout Inventory Warranty Information:Wholesaler Closeout items have a 30 day warranty (but still are covered by our Return Policy).Regular Inventory Warranty Information:60 Days

CAPA Certified or NSF Certified parts bear the seal of independent, third party organizations guaranteeing fitment and quality equal to original equipment. These parts may be required if your insurance company is paying for the repair.